J.H. Marsh
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View article: Dual-wavelength distributed feedback laser based on waveguide Bragg grating microcavities
Dual-wavelength distributed feedback laser based on waveguide Bragg grating microcavities Open
We demonstrate a new, to the best of our knowledge, dual-wavelength distributed feedback laser platform based on a waveguide Bragg grating microcavity incorporating uniform sidewall gratings. This is the first single-section, single-contac…
View article: Energy-efficient all-optical control of optomechanical photonic crystal nanobeam cavities
Energy-efficient all-optical control of optomechanical photonic crystal nanobeam cavities Open
All-optical control of silicon photonic devices is vital for on-chip signal processing, computing, and switching, but remains limited by silicon’s weak nonlinearities and high-power demand. Here, we propose, fabricate, and demonstrate a 1D…
View article: Narrow-linewidth monolithic topological interface state extended laser with optical injection locking
Narrow-linewidth monolithic topological interface state extended laser with optical injection locking Open
Narrow-linewidth lasers are essential for coherent optical applications, including communications, metrology, and sensing. Although compact semiconductor lasers with narrow linewidths have been demonstrated, achieving high spectral purity …
View article: Broadband 100 GHz Frequency Comb From an Asymmetric MQW Passively Mode-Locked Laser
Broadband 100 GHz Frequency Comb From an Asymmetric MQW Passively Mode-Locked Laser Open
We report a passively mode-locked AlGaInAs/InP laser diode based on an asymmetric multiple quantum well structure, designed for 100 GHz optical frequency comb generation near 1.5 μ m. The active region comprises quantum wells with two diff…
View article: A reconfigurable multi-channel on-chip photonic filter for programmable optical frequency division
A reconfigurable multi-channel on-chip photonic filter for programmable optical frequency division Open
Recent advancements have broadened the application of photon filters based on Bragg gratings within optical communication networks and optical input/output interfaces. Traditional gratings, however, suffer from a fixed refractive index mod…
View article: Simultaneous multi-wavelength mode-locked DFB laser based on waveguide Bragg grating microcavities
Simultaneous multi-wavelength mode-locked DFB laser based on waveguide Bragg grating microcavities Open
We demonstrate, for the first time to the best of our knowledge, a monolithic multi-wavelength mode-locked distributed feedback (DFB) laser based on waveguide Bragg grating microcavities, achieving simultaneous three-wavelength lasing near…
View article: All-optical reconfigurable photonic crystal-microring hybrid cavities with high-efficiency tuning via the mechanical Kerr effect
All-optical reconfigurable photonic crystal-microring hybrid cavities with high-efficiency tuning via the mechanical Kerr effect Open
All-optical control of silicon photonic integrated devices is crucial for on-chip applications such as signal processing, computing, and switching. A key limitation of current integrated devices is high power consumption, stemming from the…
View article: Narrow Linewidth Laser Based on Extended Topological Interface States in 1D Photonic Crystals
Narrow Linewidth Laser Based on Extended Topological Interface States in 1D Photonic Crystals Open
Advances in 1D topological photonic crystals have enabled robust light‐emitting devices through a topological interface state at the cavity center. In this study, a 1D TIS‐extended photonic crystal (1D‐TISE‐PhC) structure both theoreticall…
View article: Widely Tunable Photonic Filter Based on Equivalent Chirped Four-Phase-Shifted Sampled Bragg Gratings
Widely Tunable Photonic Filter Based on Equivalent Chirped Four-Phase-Shifted Sampled Bragg Gratings Open
We have developed an integrated dual-band photonic filter (PF) utilizing equivalent chirped four-phase-shifted sidewall-sampled Bragg gratings (4PS-SBG) on a silicon-on-insulator platform. Using the reconstruction equivalent-chirp techniqu…
View article: Heterogeneous-free narrow linewidth semiconductor laser with optical injection locking
Heterogeneous-free narrow linewidth semiconductor laser with optical injection locking Open
Narrow linewidth lasers are indispensable for coherent optical systems, including communications, metrology, and sensing. Although compact semiconductor lasers with narrow linewidths and low noise have been demonstrated, their spectral pur…
View article: Multi-wavelength DFB laser based on a sidewall third-order four phase-shifted sampled Bragg grating with uniform wavelength spacing
Multi-wavelength DFB laser based on a sidewall third-order four phase-shifted sampled Bragg grating with uniform wavelength spacing Open
We present the first, to our knowledge, demonstration of a 1550 nm multi-wavelength distributed feedback (MW-DFB) laser employing a third-order, four-phase-shifted sampled sidewall grating. By utilizing linearly chirped sampled gratings an…
View article: Continuous phase modulation technology based on grating period interval for high grating coupling coefficient and precise wavelength control
Continuous phase modulation technology based on grating period interval for high grating coupling coefficient and precise wavelength control Open
A novel, to the best of our knowledge, grating modulation technique for distributed feedback laser arrays is proposed and demonstrated. This method modifies the initial phase within each grating period, applying a total phase shift that in…
View article: Narrow linewidth distributed feedback lasers utilizing distributed phase shift
Narrow linewidth distributed feedback lasers utilizing distributed phase shift Open
This study proposes and experimentally demonstrates a distributed feedback (DFB) laser with a distributed phase shift (DPS) region at the center of the DFB cavity. By modeling the field intensity distribution in the cavity and the output s…
View article: Widely Tunable Photonic Filter Based on Equivalent Chirped Four-Phase-Shifted Sampled Bragg Gratings
Widely Tunable Photonic Filter Based on Equivalent Chirped Four-Phase-Shifted Sampled Bragg Gratings Open
We have developed an integrated dual-band photonic filter (PF) utilizing equivalent chirped four-phase-shifted sidewall-sampled Bragg gratings (4PS-SBG) on a silicon-on-insulator (SOI) platform. Using the reconstruction equivalent-chirp te…
View article: Continuous Phase Modulation Technology Based on Grating Period Interval for High Grating Coupling Efficiency and Precise Wavelength Control
Continuous Phase Modulation Technology Based on Grating Period Interval for High Grating Coupling Efficiency and Precise Wavelength Control Open
A novel grating modulation technique for laser arrays is proposed and demonstrated. This method modifies the initial phase within each grating period, applying a total phase shift that increments in an arithmetic progression, ensuring equa…
View article: Multi-Wavelength DFB Laser Based on Sidewall Third Order Four Phase-Shifted Sampled Bragg Grating with Uniform Wavelength Spacing
Multi-Wavelength DFB Laser Based on Sidewall Third Order Four Phase-Shifted Sampled Bragg Grating with Uniform Wavelength Spacing Open
We present the first demonstration of a 1550 nm multi-wavelength distributed feedback (MW-DFB) laser employing a third-order, four-phase-shifted sampled sidewall grating. By utilizing linearly chirped sampled gratings and incorporating mul…
View article: Narrow Linewidth Distributed Feedback Lasers Utilizing Distributed Phase Shift
Narrow Linewidth Distributed Feedback Lasers Utilizing Distributed Phase Shift Open
This study proposes and experimentally demonstrates a distributed feedback (DFB) laser with a distributed phase shift (DPS) region at the center of the DFB cavity. By modeling the field intensity distribution in the cavity and the output s…
View article: Subwavelength Grating Cascaded Microring Resonator Biochemical Sensors with Record-High Sensitivity
Subwavelength Grating Cascaded Microring Resonator Biochemical Sensors with Record-High Sensitivity Open
Photonic integrated circuit biochemical and biomedical sensors show promising applications in medical diagnosis, food security, healthcare, and environmental monitoring. Silicon-on-insulator subwavelength grating waveguides and cascaded mi…
View article: Narrow Linewidth Laser Based on Extended Topological Interface States in One-Dimensional Photonic Crystals
Narrow Linewidth Laser Based on Extended Topological Interface States in One-Dimensional Photonic Crystals Open
Recent advances in topological one-dimensional photonic crystal concepts have enabled the development of robust light-emitting devices by incorporating a topological interface state (TIS) at the cavity center. In this study, we theoretical…
View article: Dual-wavelength distributed feedback laser array based on four-phase-shifted sampled Bragg grating for terahertz generation
Dual-wavelength distributed feedback laser array based on four-phase-shifted sampled Bragg grating for terahertz generation Open
We propose and experimentally demonstrate a dual-wavelength distributed feedback (DFB) laser array utilizing a four-phase-shifted sampled Bragg grating. By using this grating, the coupling coefficient is enhanced by approximately 2.83 time…
View article: Characterization of near-field emission and structure of an SLD by polarization parametric indirect microscopic imaging
Characterization of near-field emission and structure of an SLD by polarization parametric indirect microscopic imaging Open
In this paper, a novel polarization parametric indirect microscopic imaging (PIMI) method is utilized for the first time to characterize the near-field emission mode and end-face structure of nanoscale semiconductor light-emitting chips. V…
View article: Millimeter-wave generation based on a monolithic dual-wavelength DFB laser with four phase-shifted sampled gratings and equivalent chirp technology
Millimeter-wave generation based on a monolithic dual-wavelength DFB laser with four phase-shifted sampled gratings and equivalent chirp technology Open
A dual-wavelength DFB laser array based on four phase-shifted grating and equivalent chirp technology is first proposed, fabricated, and experimentally demonstrated. The dual-wavelength emitting is achieved by symmetrically introducing two…
View article: Sidewall grating slot waveguide microring resonator biochemical sensor
Sidewall grating slot waveguide microring resonator biochemical sensor Open
Integrated microring resonator structures based on silicon-on-insulator (SOI) platforms are promising candidates for high-performance on-chip sensing. In this work, a novel sidewall grating slot microring resonator (SG-SMRR) with a compact…
View article: Double slot micro ring resonators with inner wall angular gratings as ultra-sensitive biochemical sensors
Double slot micro ring resonators with inner wall angular gratings as ultra-sensitive biochemical sensors Open
We simulate and demonstrate experimentally an inner-wall grating double slot micro ring resonator (IG-DSMRR) with a center slot ring radius of only 6.72 µm based on the silicon-on-insulator platform. This novel photonic-integrated sensor f…
View article: Scattering field enhanced biosensing based on sub-wavelength split-ring plasmonic cavity with high Q-factor
Scattering field enhanced biosensing based on sub-wavelength split-ring plasmonic cavity with high Q-factor Open
Plasmonic structures are widely used in modern biosensor design. various plasmonic resonant cavities could efficiently achieve a high Q-factor, improving the local field intensity to enhance photoluminescence or SERS (Surface-Enhanced Rama…
View article: Asymmetric parameter enhancement in the split-ring cavity array for virus-like particle sensing
Asymmetric parameter enhancement in the split-ring cavity array for virus-like particle sensing Open
Quantitative detection of virus-like particles under a low concentration is of vital importance for early infection diagnosis and water pollution analysis. In this paper, a novel virus detection method is proposed using indirect polarizati…
View article: Sub-wavelength visualization of near-field scattering mode of plasmonic nano-cavity in the far-field
Sub-wavelength visualization of near-field scattering mode of plasmonic nano-cavity in the far-field Open
Spatial visualization of mode distribution of light scattering from plasmonic nanostructures is of vital importance for understanding the scattering mechanism and applications based on these plasmonic nanostructures. A long unanswered ques…
View article: Inner-Wall Grating Double Slot Microring Resonator for High Sensitivity and Large Measurement Range Label-Free Biochemical Sensing
Inner-Wall Grating Double Slot Microring Resonator for High Sensitivity and Large Measurement Range Label-Free Biochemical Sensing Open
Based on the SOI platform, a double slot micro ring resonator with inner wall angular gratings is achieved with the highest sensitivity of 562.564 nm/RIU and a large measurement range of 72.62 nm.