Qingzhong Huang
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View article: Progress in silicon-based reconfigurable and programmable all-optical signal processing chips
Progress in silicon-based reconfigurable and programmable all-optical signal processing chips Open
View article: Design of an Aperiodic Optical Phased Array Based on the Multi-Strategy Enhanced Particle Swarm Optimization Algorithm
Design of an Aperiodic Optical Phased Array Based on the Multi-Strategy Enhanced Particle Swarm Optimization Algorithm Open
We have proposed a multi-strategy enhanced particle swarm optimization (PSO) algorithm to optimize the antenna spacing distribution of an optical phased array (OPA). The global search capability is improved by incorporating circle chaotic …
View article: Demonstration of ultra-compact and low-loss 2 × 2 silicon thermo-optic switches based on a mode-conversion nanobeam cavity
Demonstration of ultra-compact and low-loss 2 × 2 silicon thermo-optic switches based on a mode-conversion nanobeam cavity Open
Optical switch is an essential component in integrated photonic circuits. A mode-conversion nanobeam cavity (MCNC) coupled with two waveguides has been employed to realize ultra-compact and low-loss 2 × 2 thermo-optic switches in silicon-o…
View article: Ultra-compact, ultra-low-loss and broadband 2 × 2 nonvolatile optical switch based on Sb2Se3 phase change material
Ultra-compact, ultra-low-loss and broadband 2 × 2 nonvolatile optical switch based on Sb2Se3 phase change material Open
We propose an ultra-compact broadband 2 × 2 nonvolatile optical switch based on two adjacent silicon waveguides embedded with a low-loss phase change material (Sb2Se3). In the crystalline state of Sb2Se
View article: Large group delay and low loss optical delay line based on chirped waveguide Bragg gratings
Large group delay and low loss optical delay line based on chirped waveguide Bragg gratings Open
On-chip optical delay lines (ODLs) based on chirped waveguide Bragg gratings (CWBG) have attracted much attention in recent years. Although CWBGs are well developed, the CWBG which have large group delay (GD), large delay-bandwidth product…
View article: Demonstration of Ultra-High-Q Silicon Microring Resonators for Nonlinear Integrated Photonics
Demonstration of Ultra-High-Q Silicon Microring Resonators for Nonlinear Integrated Photonics Open
A reflowing photoresist and oxidation smoothing process is used to fabricate ultra-high-Q silicon microring resonators based on multimode rib waveguides. Over a wide range of wavelengths near 1550 nm, the average Q-factor of a ring with 1.…
View article: Diffraction gratings based on a multilayer silicon nitride waveguide with high upward efficiency and large effective length
Diffraction gratings based on a multilayer silicon nitride waveguide with high upward efficiency and large effective length Open
Diffraction gratings with high upward diffraction efficiency and large effective length are required for chip-scale light detection and ranging. We propose a diffraction grating based on a multilayer silicon nitride waveguide, which theore…
View article: High Assembly Tolerance and Cost-Effective 100-Gb/s TOSA With Silica-PLC AWG Multiplexer
High Assembly Tolerance and Cost-Effective 100-Gb/s TOSA With Silica-PLC AWG Multiplexer Open
A low-cost hybrid-integrated transmitter optical sub-assembly (TOSA) for a 100-Gb/s coarse wavelength division multiplexing (CWDM) transceiver with high assembly tolerance has been demonstrated. We have proposed a novel two-lens configurat…
View article: Photon Storage in a Dynamic Two-Ring-Two-Bus System
Photon Storage in a Dynamic Two-Ring-Two-Bus System Open
We propose a novel dynamic two-ring-two-bus system to achieve photon storage. We have demonstrated numerically that the photon can be stopped and released by tuning the ring coupled to two buses in a short time. The two-ring-two-bus system…
View article: High-Capacity and Dispersionless Delay Lines Based on Plasmonic Waveguide Periodically Coupled With Bilaterally Located Ring and Slot Resonators
High-Capacity and Dispersionless Delay Lines Based on Plasmonic Waveguide Periodically Coupled With Bilaterally Located Ring and Slot Resonators Open
We propose and study optical delay lines with high capacity and low dispersion based on a plasmonic waveguide periodically coupled with bilaterally located ring and slot resonators. The repetitive unit exhibits plasmon-induced transparency…
View article: Electromagnetically induced transparency and absorption in a compact silicon ring-bus-ring-bus system
Electromagnetically induced transparency and absorption in a compact silicon ring-bus-ring-bus system Open
We have theoretically and experimentally demonstrated electromagnetically induced transparency (EIT) and electromagnetically induced absorption (EIA) phenomena in a compact silicon ring-bus-ring-bus (RBRB) system. The two ring resonators i…
View article: Tailoring the Structure of Multilayered Hybrid Silicon Vertical Waveguide to Achieve Anomalous Dispersion
Tailoring the Structure of Multilayered Hybrid Silicon Vertical Waveguide to Achieve Anomalous Dispersion Open
In order to decrease the dispersion of the silicon vertical slot waveguide, we propose a multilayered hybrid silicon vertical waveguide structure. This multilayered waveguide is formed by three low-refractive-index regions interleaved with…
View article: Transmission of 286 Tb/s data stream in silicon subwavelength grating waveguides
Transmission of 286 Tb/s data stream in silicon subwavelength grating waveguides Open
In this paper, we perform an investigation of terabit-scale data transmission in silicon subwavelength grating (SWG) waveguides for wavelength-division multiplexing (WDM) optical signals. Silicon SWG waveguide is capable of decreasing the …
View article: Two-mode contra-directional coupler based on superposed grating
Two-mode contra-directional coupler based on superposed grating Open
We propose and demonstrate a novel two-mode grating assisted contra-directional coupler (TGACC), which is capable of filtering two modes channels simultaneously by superposed grating with two superposed grating components. Finite-differenc…
View article: Femtogram scale high frequency nano-optomechanical resonators in water
Femtogram scale high frequency nano-optomechanical resonators in water Open
A femtogram scale nanobeam optomechanical crystal (OMC) resonator operating in water is designed and demonstrated. After immersing the device in water, the mechanical Q-factor reduces to 6.6 from 2285 in air. The thermomechanical motion of…
View article: Enhanced linear absorption coefficient of in-plane monolayer graphene on a silicon microring resonator
Enhanced linear absorption coefficient of in-plane monolayer graphene on a silicon microring resonator Open
We demonstrate that enhanced linear absorption coefficient (LAC) of in-plane monolayer graphene is determined by the optical transmission spectra of a graphene layer coated symmetrically coupled add-drop silicon microring resonator (SC-ADS…
View article: Ultra-compact, broadband tunable optical bandstop filters based on a multimode one-dimensional photonic crystal waveguide
Ultra-compact, broadband tunable optical bandstop filters based on a multimode one-dimensional photonic crystal waveguide Open
In this paper, ultra-compact, broadband tunable optical bandstop filters (OBSFs) based on a multimode one-dimensional photonic crystal waveguide (PhCW) are proposed and systematically investigated. For the wavelengths in the mini-stopband,…
View article: Enhanced third harmonic generation in a silicon metasurface using trapped mode
Enhanced third harmonic generation in a silicon metasurface using trapped mode Open
We experimentally demonstrate enhanced third harmonic generation (THG) using a silicon metasurface, which is consist of symmetric spindle-shape nanoparticle array. Relying on the trapped mode supported by the high quality factor all-dielec…
View article: Air-mode photonic crystal ring resonator on silicon-on-insulator
Air-mode photonic crystal ring resonator on silicon-on-insulator Open
In this report, we propose and demonstrate an air-mode photonic crystal ring resonator (PhCRR) on silicon-on-insulator platform. Air mode is utilized to confine the optical field into photonic crystal (PhC) air holes, which is confirmed by…
View article: Tensile-Strained Mid-Infrared GeSn Detectors Wrapped in Si <sub>3</sub>N <sub>4</sub> Liner Stressor: Theoretical Investigation of Impact of Device Architectures
Tensile-Strained Mid-Infrared GeSn Detectors Wrapped in Si <sub>3</sub>N <sub>4</sub> Liner Stressor: Theoretical Investigation of Impact of Device Architectures Open
In this paper, we comparatively studied the energy band diagram and the cutoff wavelength characteristics of germanium-tin (GeSn) fin and pillar array detectors wrapped in a Si3N4 liner stressor to unveil the impacts …
View article: Tuning of resonance spacing over whole free spectral range based on Autler-Townes splitting in a single microring resonator
Tuning of resonance spacing over whole free spectral range based on Autler-Townes splitting in a single microring resonator Open
In this paper, a single microring resonator structure formed by incorporating a reflectivity-tunable loop mirror is demonstrated for the tuning of resonance spacing. Autler-Townes splitting in the resonator is utilized to tune the spacing …
View article: Design of a femtogram scale double-slot photonic crystal optomechanical cavity
Design of a femtogram scale double-slot photonic crystal optomechanical cavity Open
We present the design of a double-slot photonic crystal cavity as an optomechanical device which contains a nanomechanical resonator with an effective mass as small as 6.91 fg. The optical Q-factor is optimized to 2 × 10(5). Using phononic…
View article: Single germanium quantum dot embedded in photonic crystal nanocavity for light emitter on silicon chip
Single germanium quantum dot embedded in photonic crystal nanocavity for light emitter on silicon chip Open
A silicon light emitter in telecom-band based on a single germanium quantum dot precisely embedded in a silicon photonic crystal nanocavity is fabricated by a scalable method. A sharp resonant luminescence peak is observed at 1498.8 nm, wh…
View article: Enhanced parametric frequency conversion in a compact silicon-graphene microring resonator
Enhanced parametric frequency conversion in a compact silicon-graphene microring resonator Open
We demonstrate four-wave mixing (FWM) in a 10-μm-radius silicon microring resonator with the assistance of giant nonlinearity of the monolayer graphene. A maximum enhancement of 6.8 dB of conversion efficiency in the silicon-graphene micro…