Journal Articles |
Payton Broaddus Thilo Egenolf, Dylan Black Melanie Murillo Clarisse Woodahl Yu Miao Uwe Niedermayer Robert Byer Kenneth Leedle Olav Solgaard S L J Subrelativistic Alternating Phase Focusing Dielectric Laser Accelerators Journal Article Physical Review Letters, 132 (8), pp. 085001, 2024. @article{broaddus2024subrelativistic, title = {Subrelativistic Alternating Phase Focusing Dielectric Laser Accelerators}, author = {Payton Broaddus, Thilo Egenolf, Dylan S Black, Melanie Murillo, Clarisse Woodahl, Yu Miao, Uwe Niedermayer, Robert L Byer, Kenneth J Leedle, Olav Solgaard}, year = {2024}, date = {2024-02-23}, journal = {Physical Review Letters}, volume = {132}, number = {8}, pages = {085001}, abstract = {We demonstrate a silicon-based electron accelerator that uses laser optical near fields to both accelerate and confine electrons over extended distances. Two dielectric laser accelerator (DLA) designs were tested, each consisting of two arrays of silicon pillars pumped symmetrically by pulse front tilted laser beams, designed for average acceleration gradients 35 and 50 MeV/m, respectively. The DLAs are designed to act as alternating phase focusing (APF) lattices, where electrons, depending on the electron-laser interaction phase, will alternate between opposing longitudinal and transverse focusing and defocusing forces. By incorporating fractional period drift sections that alter the synchronous phase between ±60° off crest, electrons captured in the designed acceleration bucket experience half the peak gradient as average gradient while also experiencing strong confinement forces that enable long interaction lengths. We demonstrate APF accelerators with interaction lengths up to 708 μm and energy gains up to 23.7±1.07keV FWHM, a 25% increase from starting energy, demonstrating the ability to achieve substantial energy gains with subrelativistic DLA.}, keywords = {}, pubstate = {published}, tppubtype = {article} } We demonstrate a silicon-based electron accelerator that uses laser optical near fields to both accelerate and confine electrons over extended distances. Two dielectric laser accelerator (DLA) designs were tested, each consisting of two arrays of silicon pillars pumped symmetrically by pulse front tilted laser beams, designed for average acceleration gradients 35 and 50 MeV/m, respectively. The DLAs are designed to act as alternating phase focusing (APF) lattices, where electrons, depending on the electron-laser interaction phase, will alternate between opposing longitudinal and transverse focusing and defocusing forces. By incorporating fractional period drift sections that alter the synchronous phase between ±60° off crest, electrons captured in the designed acceleration bucket experience half the peak gradient as average gradient while also experiencing strong confinement forces that enable long interaction lengths. We demonstrate APF accelerators with interaction lengths up to 708 μm and energy gains up to 23.7±1.07keV FWHM, a 25% increase from starting energy, demonstrating the ability to achieve substantial energy gains with subrelativistic DLA. |
Zhanghao Sun Sunil Pai, Carson Valdez Maziyar Milanizadeh Andrea Melloni Francesco Morichetti David Miller Olav Solgaard A B Scalable low-latency optical phase sensor array Journal Article Optica, 10 (9), pp. 1165-1172, 2023. @article{sun2023scalable, title = {Scalable low-latency optical phase sensor array}, author = {Zhanghao Sun, Sunil Pai, Carson Valdez, Maziyar Milanizadeh, Andrea Melloni, Francesco Morichetti, David A. B. Miller, Olav Solgaard}, year = {2023}, date = {2023-08-29}, journal = {Optica}, volume = {10}, number = {9}, pages = {1165-1172}, abstract = {Optical phase measurement is critical for many applications, and traditional approaches often suffer from mechanical instability, temporal latency, and computational complexity. In this paper, we describe compact phase sensor arrays based on integrated photonics, which enable accurate and scalable reference-free phase sensing in a few measurement steps. This is achieved by connecting multiple two-port phase sensors into a graph to measure relative phases between neighboring and distant spatial locations. We propose an efficient post-processing algorithm, as well as circuit design rules to reduce random and biased error accumulations. We demonstrate the effectiveness of our system in both simulations and experiments with photonics integrated circuits. The proposed system measures the optical phase directly without the need for external references or spatial light modulators, thus providing significant benefits for applications including microscope imaging and optical phased arrays.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Optical phase measurement is critical for many applications, and traditional approaches often suffer from mechanical instability, temporal latency, and computational complexity. In this paper, we describe compact phase sensor arrays based on integrated photonics, which enable accurate and scalable reference-free phase sensing in a few measurement steps. This is achieved by connecting multiple two-port phase sensors into a graph to measure relative phases between neighboring and distant spatial locations. We propose an efficient post-processing algorithm, as well as circuit design rules to reduce random and biased error accumulations. We demonstrate the effectiveness of our system in both simulations and experiments with photonics integrated circuits. The proposed system measures the optical phase directly without the need for external references or spatial light modulators, thus providing significant benefits for applications including microscope imaging and optical phased arrays. |
Sunil Pai Taewon Park, Marshall Ball Bogdan Penkovsky Michael Dubrovsky Nathnael Abebe Maziyar Milanizadeh Francesco Morichetti Andrea Melloni Shanhui Fan Olav Solgaard David AB Miller Experimental evaluation of digitally verifiable photonic computing for blockchain and cryptocurrency Journal Article Optica, 10 (5), pp. 552-560, 2023. @article{pai2023experimentalb, title = {Experimental evaluation of digitally verifiable photonic computing for blockchain and cryptocurrency}, author = {Sunil Pai, Taewon Park, Marshall Ball, Bogdan Penkovsky, Michael Dubrovsky, Nathnael Abebe, Maziyar Milanizadeh, Francesco Morichetti, Andrea Melloni, Shanhui Fan, Olav Solgaard, David AB Miller}, year = {2023}, date = {2023-05-20}, journal = {Optica}, volume = {10}, number = {5}, pages = {552-560}, abstract = {As blockchain technology and cryptocurrency become increasingly mainstream, photonic computing has emerged as an efficient hardware platform that reduces ever-increasing energy costs required to verify transactions in decentralized cryptonetworks. To reduce sensitivity of these verifications to photonic hardware error, we propose and experimentally demonstrate a cryptographic scheme, LightHash, that implements robust, low-bit precision matrix multiplication in programmable silicon photonic networks. We demonstrate an error mitigation scheme to reduce error by averaging computation across circuits, and simulate energy-efficiency-error trade-offs for large circuit sizes. We conclude that our error-resistant and efficient hardware solution can potentially generate a new market for decentralized photonic blockchain.}, keywords = {}, pubstate = {published}, tppubtype = {article} } As blockchain technology and cryptocurrency become increasingly mainstream, photonic computing has emerged as an efficient hardware platform that reduces ever-increasing energy costs required to verify transactions in decentralized cryptonetworks. To reduce sensitivity of these verifications to photonic hardware error, we propose and experimentally demonstrate a cryptographic scheme, LightHash, that implements robust, low-bit precision matrix multiplication in programmable silicon photonic networks. We demonstrate an error mitigation scheme to reduce error by averaging computation across circuits, and simulate energy-efficiency-error trade-offs for large circuit sizes. We conclude that our error-resistant and efficient hardware solution can potentially generate a new market for decentralized photonic blockchain. |
Sunil Pai Zhanghao Sun, Tyler Hughes Taewon Park Ben Bartlett Ian AD Williamson Momchil Minkov Maziyar Milanizadeh Nathnael Abebe Francesco Morichetti Andrea Melloni Shanhui Fan Olav Solgaard David AB Miller W Experimentally realized in situ backpropagation for deep learning in photonic neural networks Journal Article Science, 380 (6643), pp. 398-404, 2023. @article{pai2023experimental, title = {Experimentally realized in situ backpropagation for deep learning in photonic neural networks}, author = {Sunil Pai, Zhanghao Sun, Tyler W Hughes, Taewon Park, Ben Bartlett, Ian AD Williamson, Momchil Minkov, Maziyar Milanizadeh, Nathnael Abebe, Francesco Morichetti, Andrea Melloni, Shanhui Fan, Olav Solgaard, David AB Miller}, year = {2023}, date = {2023-04-28}, journal = {Science}, volume = {380 }, number = {6643}, pages = {398-404}, abstract = {Integrated photonic neural networks provide a promising platform for energy-efficient, high-throughput machine learning with extensive scientific and commercial applications. Photonic neural networks efficiently transform optically encoded inputs using Mach-Zehnder interferometer mesh networks interleaved with nonlinearities. We experimentally trained a three-layer, four-port silicon photonic neural network with programmable phase shifters and optical power monitoring to solve classification tasks using “in situ backpropagation,” a photonic analog of the most popular method to train conventional neural networks. We measured backpropagated gradients for phase-shifter voltages by interfering forward- and backward-propagating light and simulated in situ backpropagation for 64-port photonic neural networks trained on MNIST image recognition given errors. All experiments performed comparably to digital simulations (94% test accuracy), and energy scaling analysis indicated a route to scalable machine learning.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Integrated photonic neural networks provide a promising platform for energy-efficient, high-throughput machine learning with extensive scientific and commercial applications. Photonic neural networks efficiently transform optically encoded inputs using Mach-Zehnder interferometer mesh networks interleaved with nonlinearities. We experimentally trained a three-layer, four-port silicon photonic neural network with programmable phase shifters and optical power monitoring to solve classification tasks using “in situ backpropagation,” a photonic analog of the most popular method to train conventional neural networks. We measured backpropagated gradients for phase-shifter voltages by interfering forward- and backward-propagating light and simulated in situ backpropagation for 64-port photonic neural networks trained on MNIST image recognition given errors. All experiments performed comparably to digital simulations (94% test accuracy), and energy scaling analysis indicated a route to scalable machine learning. |
Sunil Pai Carson Valdez, Taewon Park Maziyar Milanizadeh Francesco Morichetti Andrea Melloni Shanhui Fan Olav Solgaard David AB Miller Power monitoring in a feedforward photonic network using two output detectors Journal Article Nanophotonics, 12 (5), pp. 985-991, 2023. @article{pai2023power, title = {Power monitoring in a feedforward photonic network using two output detectors}, author = {Sunil Pai, Carson Valdez, Taewon Park, Maziyar Milanizadeh, Francesco Morichetti, Andrea Melloni, Shanhui Fan, Olav Solgaard, David AB Miller}, year = {2023}, date = {2023-03-10}, journal = {Nanophotonics}, volume = {12}, number = {5}, pages = {985-991}, abstract = {Programmable feedforward photonic meshes of Mach–Zehnder interferometers are computational optical circuits that have many classical and quantum computing applications including machine learning, sensing, and telecommunications. Such devices can form the basis of energy-efficient photonic neural networks, which solve complex tasks using photonics-accelerated matrix multiplication on a chip, and which may require calibration and training mechanisms. Such training can benefit from internal optical power monitoring and physical gradient measurement for optimizing controllable phase shifts to maximize some task merit function. Here, we design and experimentally verify a new architecture capable of power monitoring any waveguide segment in a feedforward photonic circuit. Our scheme is experimentally realized by modulating phase shifters in a 6 × 6 triangular mesh silicon photonic chip, which can non-invasively (i.e., without any internal “power taps”) resolve optical powers in a 3 × 3 triangular mesh based on response measurements in only two output detectors. We measure roughly 3% average error over 1000 trials in the presence of systematic manufacturing and environmental drift errors and verify scalability of our procedure to more modes via simulation.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Programmable feedforward photonic meshes of Mach–Zehnder interferometers are computational optical circuits that have many classical and quantum computing applications including machine learning, sensing, and telecommunications. Such devices can form the basis of energy-efficient photonic neural networks, which solve complex tasks using photonics-accelerated matrix multiplication on a chip, and which may require calibration and training mechanisms. Such training can benefit from internal optical power monitoring and physical gradient measurement for optimizing controllable phase shifts to maximize some task merit function. Here, we design and experimentally verify a new architecture capable of power monitoring any waveguide segment in a feedforward photonic circuit. Our scheme is experimentally realized by modulating phase shifters in a 6 × 6 triangular mesh silicon photonic chip, which can non-invasively (i.e., without any internal “power taps”) resolve optical powers in a 3 × 3 triangular mesh based on response measurements in only two output detectors. We measure roughly 3% average error over 1000 trials in the presence of systematic manufacturing and environmental drift errors and verify scalability of our procedure to more modes via simulation. |
Sandra Nicole Manosalvas-Kjono Ronald Quan, Olav Solgaard Integrated Amplitude and Phase Monitor for Micro-Actuators Journal Article Micromachines, 13 (8), pp. 1360, 2022. @article{manosalvas2022integrated, title = {Integrated Amplitude and Phase Monitor for Micro-Actuators}, author = {Sandra Nicole Manosalvas-Kjono, Ronald Quan, Olav Solgaard}, year = {2022}, date = {2022-08-20}, journal = {Micromachines}, volume = {13}, number = {8}, pages = {1360}, abstract = {Micro-actuators driven on resonance maximize reach and speed; however, due to their sensitivity to environmental factors (e.g., temperature and air pressure), the amplitude and phase response must be monitored to achieve an accurate actuator position. We introduce an MEMS (microelectromechanical system) amplitude and phase monitor (MAPM) with a signal-to-noise ratio of 51 dB and 11.0 kHz bandwidth, capable of simultaneously driving and sensing the movement of 1D and 2D electrostatically driven micro-actuators without modifying the chip or its packaging. The operational principle is to electromechanically modulate the amplitude of a high-frequency signal with the changing capacitance of the micro-actuator. MAPM operation is characterized and verified by simultaneously measuring the amplitude and phase frequency response of commercial micromirrors. We demonstrate that the MAPM circuitry is insensitive to complex relationships between capacitance and position of the MEMS actuators, and it is capable of giving real-time read-out of the micromirror motion. Our measurements also reveal and quantify observations of phase drift and crosstalk in 2D resonant operation. Measurements of phase changes over time under normal operation also verify the need for phase monitoring. The open-loop, high-sensitivity position sensor enables detailed characterization of dynamic micro-actuator behavior, leading to new insights and new types of operation, including improved control of nonlinear motion.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Micro-actuators driven on resonance maximize reach and speed; however, due to their sensitivity to environmental factors (e.g., temperature and air pressure), the amplitude and phase response must be monitored to achieve an accurate actuator position. We introduce an MEMS (microelectromechanical system) amplitude and phase monitor (MAPM) with a signal-to-noise ratio of 51 dB and 11.0 kHz bandwidth, capable of simultaneously driving and sensing the movement of 1D and 2D electrostatically driven micro-actuators without modifying the chip or its packaging. The operational principle is to electromechanically modulate the amplitude of a high-frequency signal with the changing capacitance of the micro-actuator. MAPM operation is characterized and verified by simultaneously measuring the amplitude and phase frequency response of commercial micromirrors. We demonstrate that the MAPM circuitry is insensitive to complex relationships between capacitance and position of the MEMS actuators, and it is capable of giving real-time read-out of the micromirror motion. Our measurements also reveal and quantify observations of phase drift and crosstalk in 2D resonant operation. Measurements of phase changes over time under normal operation also verify the need for phase monitoring. The open-loop, high-sensitivity position sensor enables detailed characterization of dynamic micro-actuator behavior, leading to new insights and new types of operation, including improved control of nonlinear motion. |
N Vaidya, Solgaard O Immersion graded index optics: theory, design, and prototypes Journal Article Microsystems & Nanoengineering , 8 (1), pp. 69, 2022. @article{vaidya2022immersion, title = {Immersion graded index optics: theory, design, and prototypes}, author = {N Vaidya, O Solgaard}, year = {2022}, date = {2022-06-27}, journal = {Microsystems & Nanoengineering }, volume = {8}, number = {1}, pages = {69}, abstract = {Immersion optics enable creation of systems with improved optical concentration and coupling by taking advantage of the fact that the luminance of light is proportional to the square of the refractive index in a lossless optical system. Immersion graded index optical concentrators, that do not need to track the source, are described in terms of theory, simulations, and experiments. We introduce a generalized design guide equation which follows the Pareto function and can be used to create various immersion graded index optics depending on the application requirements of concentration, refractive index, height, and efficiency. We present glass and polymer fabrication techniques for creating broadband transparent graded index materials with large refractive index ranges, (refractive index ratio)2 of ~2, going many fold beyond what is seen in nature or the optics industry. The prototypes demonstrate 3x optical concentration with over 90% efficiency. We report via functional prototypes that graded-index-lens concentrators perform close to the theoretical maximum limit and we introduce simple, inexpensive, design-flexible, and scalable fabrication techniques for their implementation.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Immersion optics enable creation of systems with improved optical concentration and coupling by taking advantage of the fact that the luminance of light is proportional to the square of the refractive index in a lossless optical system. Immersion graded index optical concentrators, that do not need to track the source, are described in terms of theory, simulations, and experiments. We introduce a generalized design guide equation which follows the Pareto function and can be used to create various immersion graded index optics depending on the application requirements of concentration, refractive index, height, and efficiency. We present glass and polymer fabrication techniques for creating broadband transparent graded index materials with large refractive index ranges, (refractive index ratio)2 of ~2, going many fold beyond what is seen in nature or the optics industry. The prototypes demonstrate 3x optical concentration with over 90% efficiency. We report via functional prototypes that graded-index-lens concentrators perform close to the theoretical maximum limit and we introduce simple, inexpensive, design-flexible, and scalable fabrication techniques for their implementation. |
Kenneth J Leedle Uwe Niedermayer, Eric Skär Karel Urbanek Yu Miao Payton Broaddus Olav Solgaard Robert Byer L High gradient silicon carbide immersion lens ultrafast electron sources Journal Article Journal of Applied Physics, 131 (13), 2022. @article{leedle2022high, title = {High gradient silicon carbide immersion lens ultrafast electron sources}, author = {Kenneth J Leedle, Uwe Niedermayer, Eric Skär, Karel Urbanek, Yu Miao, Payton Broaddus, Olav Solgaard, Robert L Byer}, year = {2022}, date = {2022-04-07}, journal = {Journal of Applied Physics}, volume = {131}, number = {13}, abstract = {We present two compact ultrafast electron injector designs with integrated focusing that provide high peak brightness of up to 1.9× 10 12 A/m 2 Sr 2 with 10’s of electrons per laser pulse using silicon carbide electrodes and silicon nanotip emitters. We demonstrate a few centimeter scale 96 keV immersion lens electron source and a 57 keV immersion lens electron source with a 19 kV/mm average acceleration gradient, nearly double the typical 10 kV/mm used in DC electron sources. The brightness of the electron sources is measured alongside start-to-end simulations including space charge effects. These sources are suitable for dielectric laser accelerator experiments, ultrafast electron diffraction, and other applications, where a compact high brightness electron source is required.}, keywords = {}, pubstate = {published}, tppubtype = {article} } We present two compact ultrafast electron injector designs with integrated focusing that provide high peak brightness of up to 1.9× 10 12 A/m 2 Sr 2 with 10’s of electrons per laser pulse using silicon carbide electrodes and silicon nanotip emitters. We demonstrate a few centimeter scale 96 keV immersion lens electron source and a 57 keV immersion lens electron source with a 19 kV/mm average acceleration gradient, nearly double the typical 10 kV/mm used in DC electron sources. The brightness of the electron sources is measured alongside start-to-end simulations including space charge effects. These sources are suitable for dielectric laser accelerator experiments, ultrafast electron diffraction, and other applications, where a compact high brightness electron source is required. |
Simon Lorenzo, Olav Solgaard Acoustic Localization with an Optical Fiber Silicon Microphone System Journal Article IEEE Sensors Journal, 22 (10), pp. 9408-9416, 2022. @article{lorenzo2022acoustic, title = {Acoustic Localization with an Optical Fiber Silicon Microphone System}, author = {Simon Lorenzo, Olav Solgaard}, year = {2022}, date = {2022-04-04}, journal = {IEEE Sensors Journal}, volume = {22}, number = {10}, pages = {9408-9416}, abstract = {We develop a wavelength-multiplexed system of optical fiber-based photonic-crystal microphones for acoustic source localization. Our microphones use 392μm wide and 450 nm thick photonic-crystal silicon diaphragms that we fabricate on the wafer scale and mount to an optical fiber with a simplified groove-based alignment. Our microphones have a bandwidth of acoustic sensitivity from 150 Hz to 50 kHz and an average minimum detectable pressure of 2μPa/√ Hzon resonance. The consistency of our microphone fabrication and assembly allows us to interrogate the pressure-sensitive Fabry-Pérot cavities using wavelength-sliced channels from the spontaneous emission of a C-band optical amplifier. Using our compact wavelength-multiplexed sensor system composed of standard fiber-optic communications hardware, we can localize acoustic sources in the environment to within 5 cm by a time-difference of arrival method.}, keywords = {}, pubstate = {published}, tppubtype = {article} } We develop a wavelength-multiplexed system of optical fiber-based photonic-crystal microphones for acoustic source localization. Our microphones use 392μm wide and 450 nm thick photonic-crystal silicon diaphragms that we fabricate on the wafer scale and mount to an optical fiber with a simplified groove-based alignment. Our microphones have a bandwidth of acoustic sensitivity from 150 Hz to 50 kHz and an average minimum detectable pressure of 2μPa/√ Hzon resonance. The consistency of our microphone fabrication and assembly allows us to interrogate the pressure-sensitive Fabry-Pérot cavities using wavelength-sliced channels from the spontaneous emission of a C-band optical amplifier. Using our compact wavelength-multiplexed sensor system composed of standard fiber-optic communications hardware, we can localize acoustic sources in the environment to within 5 cm by a time-difference of arrival method. |
Yuval Adiv Kangpeng Wang, Raphael Dahan Payton Broaddus Yu Miao Dylan Black Kenneth Leedle Robert Byer Olav Solgaard Joel England Ido Kaminer L R Quantum nature of dielectric laser accelerators Journal Article Physical Review X, 11 (4), pp. 041042, 2021. @article{adiv2021quantum, title = {Quantum nature of dielectric laser accelerators}, author = {Yuval Adiv, Kangpeng Wang, Raphael Dahan, Payton Broaddus, Yu Miao, Dylan Black, Kenneth Leedle, Robert L Byer, Olav Solgaard, R Joel England, Ido Kaminer}, year = {2021}, date = {2021-12-01}, journal = {Physical Review X}, volume = {11}, number = {4}, pages = {041042}, abstract = {Dielectric laser accelerators (DLAs) hold great promise for producing economic and compact on-chip radiation sources. On-chip DLAs benefit from fabrication capabilities of the silicon industry and from breakthroughs in silicon-photonic nanostructures to enhance the interaction between particles and laser fields. Seemingly unrelated recent advances in the quantum interactions of electrons and light have raised interest in the underlying classical-quantum correspondence principle at the foundations of electron acceleration. Here, we present the observation of the underlying quantum nature of DLAs: observing quantized peaks in the electron-energy spectra. Our findings demonstrate quasi-phase-matching between an electron wave function and a light wave, which also demonstrates the role of the quantum wave function in the inverse Smith-Purcell effect. We harness the capabilities of an ultrafast transmission electron microscope (UTEM) to maintain a long electron-light interaction length extending over hundreds of periods of the laser pulse, mediated by a silicon-photonic nanograting DLA. The UTEM is shown as a new platform for characterization of future DLA concepts. The results raise fundamental questions regarding the role of quantum mechanics in DLA design, and more generally about the prospects of manipulating particles’ quantum wave functions in accelerator physics.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Dielectric laser accelerators (DLAs) hold great promise for producing economic and compact on-chip radiation sources. On-chip DLAs benefit from fabrication capabilities of the silicon industry and from breakthroughs in silicon-photonic nanostructures to enhance the interaction between particles and laser fields. Seemingly unrelated recent advances in the quantum interactions of electrons and light have raised interest in the underlying classical-quantum correspondence principle at the foundations of electron acceleration. Here, we present the observation of the underlying quantum nature of DLAs: observing quantized peaks in the electron-energy spectra. Our findings demonstrate quasi-phase-matching between an electron wave function and a light wave, which also demonstrates the role of the quantum wave function in the inverse Smith-Purcell effect. We harness the capabilities of an ultrafast transmission electron microscope (UTEM) to maintain a long electron-light interaction length extending over hundreds of periods of the laser pulse, mediated by a silicon-photonic nanograting DLA. The UTEM is shown as a new platform for characterization of future DLA concepts. The results raise fundamental questions regarding the role of quantum mechanics in DLA design, and more generally about the prospects of manipulating particles’ quantum wave functions in accelerator physics. |
Zhexin Zhao Kenneth J Leedle, Dylan Black Olav Solgaard Robert Byer Shanhui Fan S L Electron pulse compression with optical beat note Journal Article Physical review letters, 127 (16), pp. 164802, 2021. @article{zhao2021electron, title = {Electron pulse compression with optical beat note}, author = {Zhexin Zhao, Kenneth J Leedle, Dylan S Black, Olav Solgaard, Robert L Byer, Shanhui Fan}, year = {2021}, date = {2021-10-14}, journal = {Physical review letters}, volume = {127}, number = {16}, pages = {164802}, abstract = {Compressing electron pulses is important in many applications of electron beam systems. In this study, we propose to use optical beat notes to compress electron pulses. The beat frequency is chosen to match the initial electron pulse duration, which enables the compression of electron pulses with a wide range of durations. This functionality extends the optical control of electron beams, which is important in compact electron beam systems such as dielectric laser accelerators. We also find that the dominant frequency of the electron charge density changes continuously along its drift trajectory, which may open up new opportunities in coherent interaction between free electrons and quantum or classical systems.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Compressing electron pulses is important in many applications of electron beam systems. In this study, we propose to use optical beat notes to compress electron pulses. The beat frequency is chosen to match the initial electron pulse duration, which enables the compression of electron pulses with a wide range of durations. This functionality extends the optical control of electron beams, which is important in compact electron beam systems such as dielectric laser accelerators. We also find that the dominant frequency of the electron charge density changes continuously along its drift trajectory, which may open up new opportunities in coherent interaction between free electrons and quantum or classical systems. |
Zhanghao Sun Ronald Quan, Olav Solgaard Resonant scanning design and control for fast spatial sampling Journal Article Scientific Reports, 11 (1), pp. 20011, 2021. @article{sun2021resonant, title = {Resonant scanning design and control for fast spatial sampling}, author = {Zhanghao Sun, Ronald Quan, Olav Solgaard}, year = {2021}, date = {2021-10-08}, journal = {Scientific Reports}, volume = {11}, number = {1}, pages = {20011}, abstract = {Two-dimensional, resonant scanners have been utilized in a large variety of imaging modules due to their compact form, low power consumption, large angular range, and high speed. However, resonant scanners have problems with non-optimal and inflexible scanning patterns and inherent phase uncertainty, which limit practical applications. Here we propose methods for optimized design and control of the scanning trajectory of two-dimensional resonant scanners under various physical constraints, including high frame-rate and limited actuation amplitude. First, we propose an analytical design rule for uniform spatial sampling. We demonstrate theoretically and experimentally that by expanding the design space, the proposed designs outperform previous designs in terms of scanning range and fill factor. Second, we show that we can create flexible scanning patterns that allow focusing on user-defined Regions-of-Interest (RoI) by modulation of the scanning parameters. The scanning parameters are found by an optimization algorithm. In simulations, we demonstrate the benefits of these designs with standard metrics and higher-level computer vision tasks (LiDAR odometry and 3D object detection). Finally, we experimentally implement and verify both unmodulated and modulated scanning modes using a two-dimensional, resonant MEMS scanner. Central to the implementations is high bandwidth monitoring of the phase of the angular scans in both dimensions. This task is carried out with a position-sensitive photodetector combined with high-bandwidth electronics, enabling fast spatial sampling at 100Hz frame-rate.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Two-dimensional, resonant scanners have been utilized in a large variety of imaging modules due to their compact form, low power consumption, large angular range, and high speed. However, resonant scanners have problems with non-optimal and inflexible scanning patterns and inherent phase uncertainty, which limit practical applications. Here we propose methods for optimized design and control of the scanning trajectory of two-dimensional resonant scanners under various physical constraints, including high frame-rate and limited actuation amplitude. First, we propose an analytical design rule for uniform spatial sampling. We demonstrate theoretically and experimentally that by expanding the design space, the proposed designs outperform previous designs in terms of scanning range and fill factor. Second, we show that we can create flexible scanning patterns that allow focusing on user-defined Regions-of-Interest (RoI) by modulation of the scanning parameters. The scanning parameters are found by an optimization algorithm. In simulations, we demonstrate the benefits of these designs with standard metrics and higher-level computer vision tasks (LiDAR odometry and 3D object detection). Finally, we experimentally implement and verify both unmodulated and modulated scanning modes using a two-dimensional, resonant MEMS scanner. Central to the implementations is high bandwidth monitoring of the phase of the angular scans in both dimensions. This task is carried out with a position-sensitive photodetector combined with high-bandwidth electronics, enabling fast spatial sampling at 100Hz frame-rate. |
Simón Lorenzo Anne Kroo, Yu-Po Wong Olav Solgaard Thermally-compensated optical fiber silicon sensor platform Journal Article IEEE Sensors Journal , 21 (21), pp. 24121-24128, 2021. @article{lorenzo2021thermally, title = {Thermally-compensated optical fiber silicon sensor platform}, author = {Simón Lorenzo, Anne Kroo, Yu-Po Wong, Olav Solgaard}, year = {2021}, date = {2021-09-10}, journal = {IEEE Sensors Journal }, volume = {21 }, number = {21}, pages = {24121-24128}, abstract = {This paper describes the characterization and testing of a temperature-compensated optical fiber platform for silicon sensors. Our sensor platform consists of standard optical fiber hardware for optically-balanced and wavelength-multiplexed reflection measurements. We show that thermal effects in silicon sensors are significant for operational temperatures from 275-315 K but can be compensated using a collocated nano-fabricated temperature sensor. Our silicon temperature sensor is a 150 μm wide and 5 μm thick disk that is fabricated on the wafer-scale with a 3 mK/ √ Hz resolution and a 1.7 s thermal time constant in air. Our temperature-compensated platform has sufficient sensitivity and bandwidth to reduce thermal signals in silicon pressure sensors and microphones by more than an order of magnitude.}, keywords = {}, pubstate = {published}, tppubtype = {article} } This paper describes the characterization and testing of a temperature-compensated optical fiber platform for silicon sensors. Our sensor platform consists of standard optical fiber hardware for optically-balanced and wavelength-multiplexed reflection measurements. We show that thermal effects in silicon sensors are significant for operational temperatures from 275-315 K but can be compensated using a collocated nano-fabricated temperature sensor. Our silicon temperature sensor is a 150 μm wide and 5 μm thick disk that is fabricated on the wafer-scale with a 3 mK/ √ Hz resolution and a 1.7 s thermal time constant in air. Our temperature-compensated platform has sufficient sensitivity and bandwidth to reduce thermal signals in silicon pressure sensors and microphones by more than an order of magnitude. |
Simon Lorenzo Yu-Po Wong, Olav Solgaard Optical fiber photonic crystal hydrophone for cellular acoustic sensing Journal Article IEEE Access, 9 , pp. 42305-42313, 2021. @article{lorenzo2021optical, title = {Optical fiber photonic crystal hydrophone for cellular acoustic sensing}, author = {Simon Lorenzo, Yu-Po Wong, Olav Solgaard}, year = {2021}, date = {2021-03-17}, journal = {IEEE Access}, volume = {9}, pages = {42305-42313}, abstract = {This paper describes the design, characterization, and testing of a compact hydrophone capable of measuring acoustic signals from cardiomyocytes. Our hydrophone consists of a nanofabricated photonic-crystal diaphragm externally-mounted to the facet of an optical fiber to form a pressure-sensitive Fabry-Pérot cavity. Our hydrophone can operate in small liquid volumes less than 5 mm deep and incorporates a microchannel to vent air during immersion. The venting channel is designed to optimize bandwidth and sensitivity. Modeling and experimental results in water show a bandwidth from 50 Hz to 18 kHz and a minimum detectable pressure of 3 μPa/ √{Hz}. We demonstrate the sensitivity to simulated bio-acoustic sources with nanometer-scale displacements.}, keywords = {}, pubstate = {published}, tppubtype = {article} } This paper describes the design, characterization, and testing of a compact hydrophone capable of measuring acoustic signals from cardiomyocytes. Our hydrophone consists of a nanofabricated photonic-crystal diaphragm externally-mounted to the facet of an optical fiber to form a pressure-sensitive Fabry-Pérot cavity. Our hydrophone can operate in small liquid volumes less than 5 mm deep and incorporates a microchannel to vent air during immersion. The venting channel is designed to optimize bandwidth and sensitivity. Modeling and experimental results in water show a bandwidth from 50 Hz to 18 kHz and a minimum detectable pressure of 3 μPa/ √{Hz}. We demonstrate the sensitivity to simulated bio-acoustic sources with nanometer-scale displacements. |
Uwe Niedermayer Dylan S. Black, Kenneth Leedle Yu Miao Robert Byer J L; Solgaard, Olav Low-energy-spread attosecond bunching and coherent electron acceleration in dielectric nanostructures Journal Article Physical Review Applied, 15 (2), pp. L021002, 2021. @article{niedermayer2021low, title = {Low-energy-spread attosecond bunching and coherent electron acceleration in dielectric nanostructures}, author = {Uwe Niedermayer, Dylan S. Black, Kenneth J. Leedle, Yu Miao, Robert L. Byer, and Olav Solgaard}, year = {2021}, date = {2021-02-11}, journal = {Physical Review Applied}, volume = {15}, number = {2}, pages = {L021002}, abstract = {We demonstrate a compact technique to compress electron pulses to attosecond length, while keeping the energy spread reasonably small. The technique is based on dielectric laser acceleration (DLA) in nanophotonic silicon structures. Unlike previous ballistic optical microbunching demonstrations, we use a modulator-demodulator scheme to compress phase space in the time and energy coordinates. A second DLA device on the same chip coherently accelerates these pulses by 1.5±0.1 keV, which is significantly larger than the remaining energy spread of 0.88+0.0−0.2keV FWHM. We show that by linearly sweeping the phase between the two stages, the energy spectrum can be coherently moved in a periodic manner, while keeping the energy spread roughly constant. After leaving the buncher, the electron pulse is also transversely focused and can be matched into a following accelerator lattice. Thus, this setup is the prototype injector into a scalable DLA based on alternating-phase focusing (APF).}, keywords = {}, pubstate = {published}, tppubtype = {article} } We demonstrate a compact technique to compress electron pulses to attosecond length, while keeping the energy spread reasonably small. The technique is based on dielectric laser acceleration (DLA) in nanophotonic silicon structures. Unlike previous ballistic optical microbunching demonstrations, we use a modulator-demodulator scheme to compress phase space in the time and energy coordinates. A second DLA device on the same chip coherently accelerates these pulses by 1.5±0.1 keV, which is significantly larger than the remaining energy spread of 0.88+0.0−0.2keV FWHM. We show that by linearly sweeping the phase between the two stages, the energy spectrum can be coherently moved in a periodic manner, while keeping the energy spread roughly constant. After leaving the buncher, the electron pulse is also transversely focused and can be matched into a following accelerator lattice. Thus, this setup is the prototype injector into a scalable DLA based on alternating-phase focusing (APF). |
Zhexin Zhao Dylan S Black, Joel England Tyler Hughes Yu Miao Olav Solgaard Robert Byer Shanhui Fan R W L Design of a multichannel photonic crystal dielectric laser accelerator Journal Article Photonics Research, 8 (10), pp. 1586-1598, 2020. @article{zhao2020designb, title = {Design of a multichannel photonic crystal dielectric laser accelerator}, author = {Zhexin Zhao, Dylan S Black, R Joel England, Tyler W Hughes, Yu Miao, Olav Solgaard, Robert L Byer, Shanhui Fan}, year = {2020}, date = {2020-10-01}, journal = {Photonics Research}, volume = {8 }, number = {10}, pages = {1586-1598}, abstract = {To be useful for most scientific and medical applications, compact particle accelerators will require much higher average current than enabled by current architectures. For this purpose, we propose a photonic crystal architecture for a dielectric laser accelerator, referred to as a multi-input multi-output silicon accelerator (MIMOSA), that enables simultaneous acceleration of multiple electron beams, increasing the total electron throughput by at least 1 order of magnitude. To achieve this, we show that the photonic crystal must support a mode at the Γ point in reciprocal space, with a normalized frequency equal to the normalized speed of the phase-matched electron. We show that the figure of merit of the MIMOSA can be inferred from the eigenmodes of the corresponding infinitely periodic structure, which provides a powerful approach to design such devices. Additionally, we extend the MIMOSA architecture to electron deflectors and other electron manipulation functionalities. These additional functionalities, combined with the increased electron throughput of these devices, permit all-optical on-chip manipulation of electron beams in a fully integrated architecture compatible with current fabrication technologies, which opens the way to unconventional electron beam shaping, imaging, and radiation generation.}, keywords = {}, pubstate = {published}, tppubtype = {article} } To be useful for most scientific and medical applications, compact particle accelerators will require much higher average current than enabled by current architectures. For this purpose, we propose a photonic crystal architecture for a dielectric laser accelerator, referred to as a multi-input multi-output silicon accelerator (MIMOSA), that enables simultaneous acceleration of multiple electron beams, increasing the total electron throughput by at least 1 order of magnitude. To achieve this, we show that the photonic crystal must support a mode at the Γ point in reciprocal space, with a normalized frequency equal to the normalized speed of the phase-matched electron. We show that the figure of merit of the MIMOSA can be inferred from the eigenmodes of the corresponding infinitely periodic structure, which provides a powerful approach to design such devices. Additionally, we extend the MIMOSA architecture to electron deflectors and other electron manipulation functionalities. These additional functionalities, combined with the increased electron throughput of these devices, permit all-optical on-chip manipulation of electron beams in a fully integrated architecture compatible with current fabrication technologies, which opens the way to unconventional electron beam shaping, imaging, and radiation generation. |
Sapra, Neil V; Yang, Ki Youl; Vercruysse, Dries; Leedle, Kenneth J; Black, Dylan S; England, Joel R; Su, Logan; Trivedi, Rahul; Miao, Yu; Solgaard, Olav; others, On-chip integrated laser-driven particle accelerator Journal Article Science, 367 (6473), pp. 79–83, 2020. BibTeX | Tags: @article{sapra2020chip, title = {On-chip integrated laser-driven particle accelerator}, author = {Neil V Sapra and Ki Youl Yang and Dries Vercruysse and Kenneth J Leedle and Dylan S Black and Joel R England and Logan Su and Rahul Trivedi and Yu Miao and Olav Solgaard and others}, year = {2020}, date = {2020-01-01}, journal = {Science}, volume = {367}, number = {6473}, pages = {79--83}, publisher = {American Association for the Advancement of Science}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Lorenzo, Simón; Solgaard, Olav Optical Fiber-Facet Multiplexed Monolithic Silicon Pressure Sensors Journal Article IEEE Sensors Journal, 2020. BibTeX | Tags: @article{lorenzo2020optical, title = {Optical Fiber-Facet Multiplexed Monolithic Silicon Pressure Sensors}, author = {Simón Lorenzo and Olav Solgaard}, year = {2020}, date = {2020-01-01}, journal = {IEEE Sensors Journal}, publisher = {IEEE}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Miao, Yu; Black, Dylan S; Leedle, Kenneth J; Zhao, Zhexin; Deng, Huiyang; Ceballos, Andrew; Byer, Robert L; Harris, James S; Solgaard, Olav Surface treatments of dielectric laser accelerators for increased laser-induced damage threshold Journal Article Optics Letters, 45 (2), pp. 391–394, 2020. BibTeX | Tags: @article{miao2020surface, title = {Surface treatments of dielectric laser accelerators for increased laser-induced damage threshold}, author = {Yu Miao and Dylan S Black and Kenneth J Leedle and Zhexin Zhao and Huiyang Deng and Andrew Ceballos and Robert L Byer and James S Harris and Olav Solgaard}, year = {2020}, date = {2020-01-01}, journal = {Optics Letters}, volume = {45}, number = {2}, pages = {391--394}, publisher = {Optical Society of America}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Deng, Huiyang; Leedle, Kenneth J; Miao, Yu; Black, Dylan S; Urbanek, Karel E; McNeur, Joshua; Kozák, Martin; Ceballos, Andrew; Hommelhoff, Peter; Solgaard, Olav; others, Gallium Oxide for High-Power Optical Applications Journal Article Advanced Optical Materials, 8 (7), pp. 1901522, 2020. BibTeX | Tags: @article{deng2020gallium, title = {Gallium Oxide for High-Power Optical Applications}, author = {Huiyang Deng and Kenneth J Leedle and Yu Miao and Dylan S Black and Karel E Urbanek and Joshua McNeur and Martin Kozák and Andrew Ceballos and Peter Hommelhoff and Olav Solgaard and others}, year = {2020}, date = {2020-01-01}, journal = {Advanced Optical Materials}, volume = {8}, number = {7}, pages = {1901522}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Zhao, Zhexin; Black, Dylan S; England, Joel R; Hughes, Tyler W; Miao, Yu; Solgaard, Olav; Byer, Robert L; Fan, Shanhui Design of a multi-channel photonic crystal dielectric laser accelerator Journal Article arXiv preprint arXiv:2001.09583, 2020. BibTeX | Tags: @article{zhao2020design, title = {Design of a multi-channel photonic crystal dielectric laser accelerator}, author = {Zhexin Zhao and Dylan S Black and Joel R England and Tyler W Hughes and Yu Miao and Olav Solgaard and Robert L Byer and Shanhui Fan}, year = {2020}, date = {2020-01-01}, journal = {arXiv preprint arXiv:2001.09583}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Deng, Huiyang; Leedle, Kenneth J; Miao, Yu; Black, Dylan S; Urbanek, Karel E; McNeur, Joshua; Kozák, Martin; Ceballos, Andrew; Hommelhoff, Peter; Solgaard, Olav; others, Ga2O3-Based Optical Applications: Gallium Oxide for High-Power Optical Applications (Advanced Optical Materials 7/2020) Journal Article Advanced Optical Materials, 8 (7), pp. 2070026, 2020. BibTeX | Tags: @article{deng2020ga2o3, title = {Ga2O3-Based Optical Applications: Gallium Oxide for High-Power Optical Applications (Advanced Optical Materials 7/2020)}, author = {Huiyang Deng and Kenneth J Leedle and Yu Miao and Dylan S Black and Karel E Urbanek and Joshua McNeur and Martin Kozák and Andrew Ceballos and Peter Hommelhoff and Olav Solgaard and others}, year = {2020}, date = {2020-01-01}, journal = {Advanced Optical Materials}, volume = {8}, number = {7}, pages = {2070026}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Sun, Zhanghao; Lindell, David B; Solgaard, Olav; Wetzstein, Gordon SPADnet: deep RGB-SPAD sensor fusion assisted by monocular depth estimation Journal Article Optics Express, 28 (10), pp. 14948–14962, 2020. BibTeX | Tags: @article{sun2020spadnet, title = {SPADnet: deep RGB-SPAD sensor fusion assisted by monocular depth estimation}, author = {Zhanghao Sun and David B Lindell and Olav Solgaard and Gordon Wetzstein}, year = {2020}, date = {2020-01-01}, journal = {Optics Express}, volume = {28}, number = {10}, pages = {14948--14962}, publisher = {Optical Society of America}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Printz, Adam D; Zhao, Oliver; Hamann, Stephen; Rolston, Nicholas; Solgaard, Olav; Dauskardt, Reinhold H Self-aligned concentrating immersion-lens arrays for patterning and efficiency recovery in scaffold-reinforced perovskite solar cells Journal Article Applied Materials Today, 20 , pp. 100704, 2020. BibTeX | Tags: @article{printz2020self, title = {Self-aligned concentrating immersion-lens arrays for patterning and efficiency recovery in scaffold-reinforced perovskite solar cells}, author = {Adam D Printz and Oliver Zhao and Stephen Hamann and Nicholas Rolston and Olav Solgaard and Reinhold H Dauskardt}, year = {2020}, date = {2020-01-01}, journal = {Applied Materials Today}, volume = {20}, pages = {100704}, publisher = {Elsevier}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Pai, Sunil; Williamson, Ian; Hughes, Tyler W; Minkov, Momchil; Solgaard, Olav; Fan, Shanhui; Miller, David AB Parallel programming of an arbitrary feedforward photonic network Journal Article IEEE Journal of Selected Topics in Quantum Electronics, 2020. BibTeX | Tags: @article{pai2020parallel, title = {Parallel programming of an arbitrary feedforward photonic network}, author = {Sunil Pai and Ian Williamson and Tyler W Hughes and Momchil Minkov and Olav Solgaard and Shanhui Fan and David AB Miller}, year = {2020}, date = {2020-01-01}, journal = {IEEE Journal of Selected Topics in Quantum Electronics}, publisher = {IEEE}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Landry, Joseph R; Hamann, Stephen S; Solgaard, Olav Random access cylindrical lensing and beam steering using a high-speed linear phased array Journal Article IEEE Photonics Technology Letters, 32 (14), pp. 859–862, 2020. BibTeX | Tags: @article{landry2020random, title = {Random access cylindrical lensing and beam steering using a high-speed linear phased array}, author = {Joseph R Landry and Stephen S Hamann and Olav Solgaard}, year = {2020}, date = {2020-01-01}, journal = {IEEE Photonics Technology Letters}, volume = {32}, number = {14}, pages = {859--862}, publisher = {IEEE}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Niedermayer, Uwe; Black, Dylan S; Leedle, Kenneth J; Miao, Yu; Byer, Robert L; Solgaard, Olav Low Energy Spread Attosecond Bunching and Coherent Electron Acceleration in Dielectric Nanostructures Journal Article arXiv preprint arXiv:2008.02147, 2020. BibTeX | Tags: @article{niedermayer2020low, title = {Low Energy Spread Attosecond Bunching and Coherent Electron Acceleration in Dielectric Nanostructures}, author = {Uwe Niedermayer and Dylan S Black and Kenneth J Leedle and Yu Miao and Robert L Byer and Olav Solgaard}, year = {2020}, date = {2020-01-01}, journal = {arXiv preprint arXiv:2008.02147}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Ashida, Yuki; Hamann, Stephen; Landry, Joseph; Solgaard, Olav Conjugated MEMS Phased Arrays for Large Field of View Random Access Scanning Journal Article IEEE Photonics Technology Letters, 32 (20), pp. 1291–1294, 2020. BibTeX | Tags: @article{ashida2020conjugated, title = {Conjugated MEMS Phased Arrays for Large Field of View Random Access Scanning}, author = {Yuki Ashida and Stephen Hamann and Joseph Landry and Olav Solgaard}, year = {2020}, date = {2020-01-01}, journal = {IEEE Photonics Technology Letters}, volume = {32}, number = {20}, pages = {1291--1294}, publisher = {IEEE}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Landry, Joseph; Hamann, Stephen; Solgaard, Olav High-speed axially swept light sheet microscopy using a linear MEMS phased array for isotropic resolution Journal Article Journal of Biomedical Optics, 25 (10), pp. 106504, 2020. BibTeX | Tags: @article{landry2020high, title = {High-speed axially swept light sheet microscopy using a linear MEMS phased array for isotropic resolution}, author = {Joseph Landry and Stephen Hamann and Olav Solgaard}, year = {2020}, date = {2020-01-01}, journal = {Journal of Biomedical Optics}, volume = {25}, number = {10}, pages = {106504}, publisher = {International Society for Optics and Photonics}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Black, Dylan S; Zhao, Zhexin; Leedle, Kenneth J; Miao, Yu; Byer, Robert L; Fan, Shanhui; Solgaard, Olav Operating modes of dual-grating dielectric laser accelerators Journal Article Physical Review Accelerators and Beams, 23 (11), pp. 114001, 2020. BibTeX | Tags: @article{black2020operating, title = {Operating modes of dual-grating dielectric laser accelerators}, author = {Dylan S Black and Zhexin Zhao and Kenneth J Leedle and Yu Miao and Robert L Byer and Shanhui Fan and Olav Solgaard}, year = {2020}, date = {2020-01-01}, journal = {Physical Review Accelerators and Beams}, volume = {23}, number = {11}, pages = {114001}, publisher = {American Physical Society}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Lorenzo, S; Wong, Y; Solgaard, O Optical Fiber-Tip Monolithic Silicon Pressure Sensors Journal Article IEEE Sensors Journal, 20 (5), pp. 2476-2484, 2020. @article{8894452, title = {Optical Fiber-Tip Monolithic Silicon Pressure Sensors}, author = {S Lorenzo and Y Wong and O Solgaard}, doi = {10.1109/JSEN.2019.2952546}, year = {2020}, date = {2020-01-01}, journal = {IEEE Sensors Journal}, volume = {20}, number = {5}, pages = {2476-2484}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Pai, Sunil; Bartlett, Ben; Solgaard, Olav; Miller, David AB Matrix optimization on universal unitary photonic devices Journal Article Physical Review Applied, 11 (6), pp. 064044, 2019. BibTeX | Tags: @article{pai2019matrix, title = {Matrix optimization on universal unitary photonic devices}, author = {Sunil Pai and Ben Bartlett and Olav Solgaard and David AB Miller}, year = {2019}, date = {2019-01-01}, journal = {Physical Review Applied}, volume = {11}, number = {6}, pages = {064044}, publisher = {American Physical Society}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Black, Dylan S; Leedle, Kenneth J; Miao, Yu; Niedermayer, Uwe; Byer, Robert L; Solgaard, Olav; Collaboration, Achip; others, Laser-driven electron lensing in silicon microstructures Journal Article Physical review letters, 122 (10), pp. 104801, 2019. BibTeX | Tags: @article{black2019laser, title = {Laser-driven electron lensing in silicon microstructures}, author = {Dylan S Black and Kenneth J Leedle and Yu Miao and Uwe Niedermayer and Robert L Byer and Olav Solgaard and Achip Collaboration and others}, year = {2019}, date = {2019-01-01}, journal = {Physical review letters}, volume = {122}, number = {10}, pages = {104801}, publisher = {American Physical Society}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Landry, Joseph R; Itoh, Ryosuke; Li, Jonathan M; Hamann, Stephen S; Mandella, Michael; Contag, Christopher H; Solgaard, Olav Tunable structured illumination light sheet microscopy for background rejection and imaging depth in minimally processed tissues Journal Article Journal of biomedical optics, 24 (4), pp. 046501, 2019. BibTeX | Tags: @article{landry2019tunable, title = {Tunable structured illumination light sheet microscopy for background rejection and imaging depth in minimally processed tissues}, author = {Joseph R Landry and Ryosuke Itoh and Jonathan M Li and Stephen S Hamann and Michael Mandella and Christopher H Contag and Olav Solgaard}, year = {2019}, date = {2019-01-01}, journal = {Journal of biomedical optics}, volume = {24}, number = {4}, pages = {046501}, publisher = {International Society for Optics and Photonics}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Niedermayer, Uwe; Adelmann, Andreas; Bettoni, S; Calvi, M; Dehler, M; Ferrari, E; Frei, F; Hauenstein, D; Hermann, B; Hiller, N; others, Challenges in simulating beam dynamics of dielectric laser acceleration Journal Article International Journal of Modern Physics A, 34 (36), pp. 1942031, 2019. BibTeX | Tags: @article{niedermayer2019challenges, title = {Challenges in simulating beam dynamics of dielectric laser acceleration}, author = {Uwe Niedermayer and Andreas Adelmann and S Bettoni and M Calvi and M Dehler and E Ferrari and F Frei and D Hauenstein and B Hermann and N Hiller and others}, year = {2019}, date = {2019-01-01}, journal = {International Journal of Modern Physics A}, volume = {34}, number = {36}, pages = {1942031}, publisher = {World Scientific Publishing Company}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Wong, Yu-Po; Lorenzo, Simón; Miao, Yu; Bregman, Jeremy; Solgaard, Olav Extended design space of silicon-on-nothing MEMS Journal Article Journal of Microelectromechanical Systems, 28 (5), pp. 850–858, 2019. BibTeX | Tags: @article{wong2019extended, title = {Extended design space of silicon-on-nothing MEMS}, author = {Yu-Po Wong and Simón Lorenzo and Yu Miao and Jeremy Bregman and Olav Solgaard}, year = {2019}, date = {2019-01-01}, journal = {Journal of Microelectromechanical Systems}, volume = {28}, number = {5}, pages = {850--858}, publisher = {IEEE}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Black, Dylan S; Niedermayer, Uwe; Miao, Yu; Zhao, Zhexin; Solgaard, Olav; Byer, Robert L; Leedle, Kenneth J Net Acceleration and Direct Measurement of Attosecond Electron Pulses in a Silicon Dielectric Laser Accelerator Journal Article Physical Review Letters, 123 (26), pp. 264802, 2019. BibTeX | Tags: @article{black2019net, title = {Net Acceleration and Direct Measurement of Attosecond Electron Pulses in a Silicon Dielectric Laser Accelerator}, author = {Dylan S Black and Uwe Niedermayer and Yu Miao and Zhexin Zhao and Olav Solgaard and Robert L Byer and Kenneth J Leedle}, year = {2019}, date = {2019-01-01}, journal = {Physical Review Letters}, volume = {123}, number = {26}, pages = {264802}, publisher = {American Physical Society}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Pai, Sunil; Williamson, Ian AD; Hughes, Tyler W; Minkov, Momchil; Solgaard, Olav; Fan, Shanhui; Miller, David AB Parallel fault-tolerant programming of an arbitrary feedforward photonic network Journal Article arXiv preprint arXiv:1909.06179, 2019. BibTeX | Tags: @article{pai2019parallel, title = {Parallel fault-tolerant programming of an arbitrary feedforward photonic network}, author = {Sunil Pai and Ian AD Williamson and Tyler W Hughes and Momchil Minkov and Olav Solgaard and Shanhui Fan and David AB Miller}, year = {2019}, date = {2019-01-01}, journal = {arXiv preprint arXiv:1909.06179}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Loewke, Nathan O; Qiu, Zhen; Mandella, Michael J; Ertsey, Robert; Loewke, Adrienne; Gunaydin, Lisa A; Rosenthal, Eben L; Contag, Christopher H; Solgaard, Olav Software-Based Phase Control, Video-Rate Imaging, and Real-Time Mosaicing With a Lissajous-Scanned Confocal Microscope Journal Article IEEE Transactions on Medical Imaging, 39 (4), pp. 1127–1137, 2019. BibTeX | Tags: @article{loewke2019software, title = {Software-Based Phase Control, Video-Rate Imaging, and Real-Time Mosaicing With a Lissajous-Scanned Confocal Microscope}, author = {Nathan O Loewke and Zhen Qiu and Michael J Mandella and Robert Ertsey and Adrienne Loewke and Lisa A Gunaydin and Eben L Rosenthal and Christopher H Contag and Olav Solgaard}, year = {2019}, date = {2019-01-01}, journal = {IEEE Transactions on Medical Imaging}, volume = {39}, number = {4}, pages = {1127--1137}, publisher = {IEEE}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Wong, Yu-Po; Lorenzo, Simón; Solgaard, Olav Design and Fabrication of Monolithic Photonic Crystal Fiber Acoustic Sensor Journal Article IEEE Sensors Journal, 2018. BibTeX | Tags: @article{wong2018design, title = {Design and Fabrication of Monolithic Photonic Crystal Fiber Acoustic Sensor}, author = {Yu-Po Wong and Simón Lorenzo and Olav Solgaard}, year = {2018}, date = {2018-01-01}, journal = {IEEE Sensors Journal}, publisher = {IEEE}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Vaidya, Nina; Solgaard, Olav 3D printed optics with nanometer scale surface roughness Journal Article Microsystems & Nanoengineering, 4 (1), pp. 18, 2018. BibTeX | Tags: @article{vaidya20183d, title = {3D printed optics with nanometer scale surface roughness}, author = {Nina Vaidya and Olav Solgaard}, year = {2018}, date = {2018-01-01}, journal = {Microsystems & Nanoengineering}, volume = {4}, number = {1}, pages = {18}, publisher = {Nature Publishing Group}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Pai, Sunil; Bartlett, Ben; Solgaard, Olav; Miller, David AB Matrix optimization on universal unitary photonic devices Journal Article arXiv preprint arXiv:1808.00458, 2018. BibTeX | Tags: @article{pai2018matrix, title = {Matrix optimization on universal unitary photonic devices}, author = {Sunil Pai and Ben Bartlett and Olav Solgaard and David AB Miller}, year = {2018}, date = {2018-01-01}, journal = {arXiv preprint arXiv:1808.00458}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Hughes, Tyler W; Tan, Si; Zhao, Zhexin; Sapra, Neil V; Leedle, Kenneth J; Deng, Huiyang; Miao, Yu; Black, Dylan S; Solgaard, Olav; Harris, James S; others, On-Chip Laser-Power Delivery System for Dielectric Laser Accelerators Journal Article Physical Review Applied, 9 (5), pp. 054017, 2018. BibTeX | Tags: @article{hughes2018chip, title = {On-Chip Laser-Power Delivery System for Dielectric Laser Accelerators}, author = {Tyler W Hughes and Si Tan and Zhexin Zhao and Neil V Sapra and Kenneth J Leedle and Huiyang Deng and Yu Miao and Dylan S Black and Olav Solgaard and James S Harris and others}, year = {2018}, date = {2018-01-01}, journal = {Physical Review Applied}, volume = {9}, number = {5}, pages = {054017}, publisher = {American Physical Society}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Loewke, Nathan O; Pai, Sunil; Cordeiro, Christine; Black, Dylan; King, Bonnie L; Contag, Christopher H; Chen, Bertha; Baer, Thomas M; Solgaard, Olav Automated Cell Segmentation for Quantitative Phase Microscopy Journal Article IEEE transactions on medical imaging, 37 (4), pp. 929–940, 2018. BibTeX | Tags: @article{loewke2018automated, title = {Automated Cell Segmentation for Quantitative Phase Microscopy}, author = {Nathan O Loewke and Sunil Pai and Christine Cordeiro and Dylan Black and Bonnie L King and Christopher H Contag and Bertha Chen and Thomas M Baer and Olav Solgaard}, year = {2018}, date = {2018-01-01}, journal = {IEEE transactions on medical imaging}, volume = {37}, number = {4}, pages = {929--940}, publisher = {IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Hamann, Stephen; Shi, Liang; Solgaard, Olav; Wetzstein, Gordon Time-multiplexed light field synthesis via factored Wigner distribution function Journal Article Optics letters, 43 (3), pp. 599–602, 2018. BibTeX | Tags: @article{hamann2018time, title = {Time-multiplexed light field synthesis via factored Wigner distribution function}, author = {Stephen Hamann and Liang Shi and Olav Solgaard and Gordon Wetzstein}, year = {2018}, date = {2018-01-01}, journal = {Optics letters}, volume = {43}, number = {3}, pages = {599--602}, publisher = {Optical Society of America}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Leedle, Kenneth J; Black, Dylan S; Miao, Yu; Urbanek, Karel E; Ceballos, Andrew; Deng, Huiyang; Harris, James S; Solgaard, Olav; Byer, Robert L Phase-dependent laser acceleration of electrons with symmetrically driven silicon dual pillar gratings Journal Article Optics letters, 43 (9), pp. 2181–2184, 2018. BibTeX | Tags: @article{leedle2018phase, title = {Phase-dependent laser acceleration of electrons with symmetrically driven silicon dual pillar gratings}, author = {Kenneth J Leedle and Dylan S Black and Yu Miao and Karel E Urbanek and Andrew Ceballos and Huiyang Deng and James S Harris and Olav Solgaard and Robert L Byer}, year = {2018}, date = {2018-01-01}, journal = {Optics letters}, volume = {43}, number = {9}, pages = {2181--2184}, publisher = {Optical Society of America}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Wong, Yu-Po; Miao, Yu; Skarda, Jinhie; Solgaard, Olav Large negative and positive optical Goos--Hänchen shift in photonic crystals Journal Article Optics letters, 43 (12), pp. 2803–2806, 2018. BibTeX | Tags: @article{wong2018large, title = {Large negative and positive optical Goos--Hänchen shift in photonic crystals}, author = {Yu-Po Wong and Yu Miao and Jinhie Skarda and Olav Solgaard}, year = {2018}, date = {2018-01-01}, journal = {Optics letters}, volume = {43}, number = {12}, pages = {2803--2806}, publisher = {Optical Society of America}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
McNeur, Joshua; Kozák, Martin; Schönenberger, Norbert; Leedle, Kenneth J; Deng, Huiyang; Ceballos, Andrew; Hoogland, Heinar; Ruehl, Axel; Hartl, Ingmar; Holzwarth, Ronald; others, Elements of a dielectric laser accelerator Journal Article Optica, 5 (6), pp. 687–690, 2018. BibTeX | Tags: @article{mcneur2018elements, title = {Elements of a dielectric laser accelerator}, author = {Joshua McNeur and Martin Kozák and Norbert Schönenberger and Kenneth J Leedle and Huiyang Deng and Andrew Ceballos and Heinar Hoogland and Axel Ruehl and Ingmar Hartl and Ronald Holzwarth and others}, year = {2018}, date = {2018-01-01}, journal = {Optica}, volume = {5}, number = {6}, pages = {687--690}, publisher = {Optical Society of America}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Deng, Huiyang; Jiang, Jiaqi; Miao, Yu; Leedle, Kenneth J; Li, Hongquan; Solgaard, Olav; Byer, Robert L; Harris, James S Design of racetrack ring resonator based dielectric laser accelerators Journal Article arXiv preprint arXiv:1701.08945, 2017. BibTeX | Tags: @article{deng2017design, title = {Design of racetrack ring resonator based dielectric laser accelerators}, author = {Huiyang Deng and Jiaqi Jiang and Yu Miao and Kenneth J Leedle and Hongquan Li and Olav Solgaard and Robert L Byer and James S Harris}, year = {2017}, date = {2017-01-01}, journal = {arXiv preprint arXiv:1701.08945}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Wootton, Kent; Hartl, Ingmar; Lee, Yun Jo; McNeur, Josh; Fan, Shanhui; Sapra, Neil; Harris, James; Qi, Minghao; Egenolf, Thilo; Schönenberger, Norbert; others, Towards a fully integrated accelerator on a chip: Dielectric laser acceleration (DLA) from the source to relativistic electrons Journal Article 2017. BibTeX | Tags: @article{wootton2017towards, title = {Towards a fully integrated accelerator on a chip: Dielectric laser acceleration (DLA) from the source to relativistic electrons}, author = {Kent Wootton and Ingmar Hartl and Yun Jo Lee and Josh McNeur and Shanhui Fan and Neil Sapra and James Harris and Minghao Qi and Thilo Egenolf and Norbert Schönenberger and others}, year = {2017}, date = {2017-01-01}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Journal Articles |
Subrelativistic Alternating Phase Focusing Dielectric Laser Accelerators Journal Article Physical Review Letters, 132 (8), pp. 085001, 2024. |
Scalable low-latency optical phase sensor array Journal Article Optica, 10 (9), pp. 1165-1172, 2023. |
Experimental evaluation of digitally verifiable photonic computing for blockchain and cryptocurrency Journal Article Optica, 10 (5), pp. 552-560, 2023. |
Experimentally realized in situ backpropagation for deep learning in photonic neural networks Journal Article Science, 380 (6643), pp. 398-404, 2023. |
Power monitoring in a feedforward photonic network using two output detectors Journal Article Nanophotonics, 12 (5), pp. 985-991, 2023. |
Integrated Amplitude and Phase Monitor for Micro-Actuators Journal Article Micromachines, 13 (8), pp. 1360, 2022. |
Immersion graded index optics: theory, design, and prototypes Journal Article Microsystems & Nanoengineering , 8 (1), pp. 69, 2022. |
High gradient silicon carbide immersion lens ultrafast electron sources Journal Article Journal of Applied Physics, 131 (13), 2022. |
Acoustic Localization with an Optical Fiber Silicon Microphone System Journal Article IEEE Sensors Journal, 22 (10), pp. 9408-9416, 2022. |
Quantum nature of dielectric laser accelerators Journal Article Physical Review X, 11 (4), pp. 041042, 2021. |
Electron pulse compression with optical beat note Journal Article Physical review letters, 127 (16), pp. 164802, 2021. |
Resonant scanning design and control for fast spatial sampling Journal Article Scientific Reports, 11 (1), pp. 20011, 2021. |
Thermally-compensated optical fiber silicon sensor platform Journal Article IEEE Sensors Journal , 21 (21), pp. 24121-24128, 2021. |
Optical fiber photonic crystal hydrophone for cellular acoustic sensing Journal Article IEEE Access, 9 , pp. 42305-42313, 2021. |
Low-energy-spread attosecond bunching and coherent electron acceleration in dielectric nanostructures Journal Article Physical Review Applied, 15 (2), pp. L021002, 2021. |
Design of a multichannel photonic crystal dielectric laser accelerator Journal Article Photonics Research, 8 (10), pp. 1586-1598, 2020. |
On-chip integrated laser-driven particle accelerator Journal Article Science, 367 (6473), pp. 79–83, 2020. |
Optical Fiber-Facet Multiplexed Monolithic Silicon Pressure Sensors Journal Article IEEE Sensors Journal, 2020. |
Surface treatments of dielectric laser accelerators for increased laser-induced damage threshold Journal Article Optics Letters, 45 (2), pp. 391–394, 2020. |
Gallium Oxide for High-Power Optical Applications Journal Article Advanced Optical Materials, 8 (7), pp. 1901522, 2020. |
Design of a multi-channel photonic crystal dielectric laser accelerator Journal Article arXiv preprint arXiv:2001.09583, 2020. |
Ga2O3-Based Optical Applications: Gallium Oxide for High-Power Optical Applications (Advanced Optical Materials 7/2020) Journal Article Advanced Optical Materials, 8 (7), pp. 2070026, 2020. |
SPADnet: deep RGB-SPAD sensor fusion assisted by monocular depth estimation Journal Article Optics Express, 28 (10), pp. 14948–14962, 2020. |
Self-aligned concentrating immersion-lens arrays for patterning and efficiency recovery in scaffold-reinforced perovskite solar cells Journal Article Applied Materials Today, 20 , pp. 100704, 2020. |
Parallel programming of an arbitrary feedforward photonic network Journal Article IEEE Journal of Selected Topics in Quantum Electronics, 2020. |
Random access cylindrical lensing and beam steering using a high-speed linear phased array Journal Article IEEE Photonics Technology Letters, 32 (14), pp. 859–862, 2020. |
Low Energy Spread Attosecond Bunching and Coherent Electron Acceleration in Dielectric Nanostructures Journal Article arXiv preprint arXiv:2008.02147, 2020. |
Conjugated MEMS Phased Arrays for Large Field of View Random Access Scanning Journal Article IEEE Photonics Technology Letters, 32 (20), pp. 1291–1294, 2020. |
High-speed axially swept light sheet microscopy using a linear MEMS phased array for isotropic resolution Journal Article Journal of Biomedical Optics, 25 (10), pp. 106504, 2020. |
Operating modes of dual-grating dielectric laser accelerators Journal Article Physical Review Accelerators and Beams, 23 (11), pp. 114001, 2020. |
Optical Fiber-Tip Monolithic Silicon Pressure Sensors Journal Article IEEE Sensors Journal, 20 (5), pp. 2476-2484, 2020. |
Matrix optimization on universal unitary photonic devices Journal Article Physical Review Applied, 11 (6), pp. 064044, 2019. |
Laser-driven electron lensing in silicon microstructures Journal Article Physical review letters, 122 (10), pp. 104801, 2019. |
Tunable structured illumination light sheet microscopy for background rejection and imaging depth in minimally processed tissues Journal Article Journal of biomedical optics, 24 (4), pp. 046501, 2019. |
Challenges in simulating beam dynamics of dielectric laser acceleration Journal Article International Journal of Modern Physics A, 34 (36), pp. 1942031, 2019. |
Extended design space of silicon-on-nothing MEMS Journal Article Journal of Microelectromechanical Systems, 28 (5), pp. 850–858, 2019. |
Net Acceleration and Direct Measurement of Attosecond Electron Pulses in a Silicon Dielectric Laser Accelerator Journal Article Physical Review Letters, 123 (26), pp. 264802, 2019. |
Parallel fault-tolerant programming of an arbitrary feedforward photonic network Journal Article arXiv preprint arXiv:1909.06179, 2019. |
Software-Based Phase Control, Video-Rate Imaging, and Real-Time Mosaicing With a Lissajous-Scanned Confocal Microscope Journal Article IEEE Transactions on Medical Imaging, 39 (4), pp. 1127–1137, 2019. |
Design and Fabrication of Monolithic Photonic Crystal Fiber Acoustic Sensor Journal Article IEEE Sensors Journal, 2018. |
3D printed optics with nanometer scale surface roughness Journal Article Microsystems & Nanoengineering, 4 (1), pp. 18, 2018. |
Matrix optimization on universal unitary photonic devices Journal Article arXiv preprint arXiv:1808.00458, 2018. |
On-Chip Laser-Power Delivery System for Dielectric Laser Accelerators Journal Article Physical Review Applied, 9 (5), pp. 054017, 2018. |
Automated Cell Segmentation for Quantitative Phase Microscopy Journal Article IEEE transactions on medical imaging, 37 (4), pp. 929–940, 2018. |
Time-multiplexed light field synthesis via factored Wigner distribution function Journal Article Optics letters, 43 (3), pp. 599–602, 2018. |
Phase-dependent laser acceleration of electrons with symmetrically driven silicon dual pillar gratings Journal Article Optics letters, 43 (9), pp. 2181–2184, 2018. |
Large negative and positive optical Goos--Hänchen shift in photonic crystals Journal Article Optics letters, 43 (12), pp. 2803–2806, 2018. |
Elements of a dielectric laser accelerator Journal Article Optica, 5 (6), pp. 687–690, 2018. |
Design of racetrack ring resonator based dielectric laser accelerators Journal Article arXiv preprint arXiv:1701.08945, 2017. |
Towards a fully integrated accelerator on a chip: Dielectric laser acceleration (DLA) from the source to relativistic electrons Journal Article 2017. |