A5100411948- Photonic and Optical Devices
- Advanced Fiber Optic Sensors
- Optical Coatings and Gratings
- GaN-based semiconductor devices and materials
- Semiconductor Quantum Structures and Devices
- Advanced Photonic Communication Systems
- Semiconductor Lasers and Optical Devices
- Photonic Crystals and Applications
- Intermetallics and Advanced Alloy Properties
- High-pressure geophysics and materials
- Chemical Thermodynamics and Molecular Structure
- Perovskite Materials and Applications
- Semiconductor materials and interfaces
- Aluminum Alloy Microstructure Properties
- Advanced Measurement and Metrology Techniques
- Advanced Sensor and Control Systems
- Magnesium Alloys: Properties and Applications
- Electronic and Structural Properties of Oxides
- Boron and Carbon Nanomaterials Research
- Semiconductor materials and devices
- Heusler alloys: electronic and magnetic properties
- Complex Systems and Time Series Analysis
- Sparse and Compressive Sensing Techniques
- Chaos control and synchronization
- Ga2O3 and related materials
Xidian University
2017-2023
Tiangong University
2011-2023
Beijing Jiaotong University
2023
Guilin University of Electronic Technology
2022
Grinm Advanced Materials (China)
2019
General Research Institute for Nonferrous Metals (China)
2019
State Key Laboratory of Nonferrous Metals and Processes
2019
Beijing Microelectronics Technology Institute
2018
Hubei University of Arts and Science
2018
Huazhong University of Science and Technology
2018
We propose and experimentally demonstrate an apodized bidirectional grating coupler for high-efficiency, perfectly vertical coupling. Through apodization, the coupling efficiency (CE) can be notably improved, parasitic reflections minimized. For ease of fabrication, subwavelength gratings are introduced, which also beneficial performance. Simulation shows a record CE 72%. found that is quite robust to variation incidence mode field diameter fiber misalignment. A -1.8 dB measured with 1-dB...
A high power light-emitting diodes (LED) light source, which is assembled by many LED chips and heat sink, has a not uniform temperature distribution at working condition. Analysis prediction of high-power system lifetime are complicated time-consuming. In this study, two artificial neural networks (ANN) employed to simplify the lighting system’s increase precision such analysis. The source calculated Finite element method (FEM) with chip photo-electro-thermal (PET) ANN. With precise...
A four-port grating coupler with etched square holes is proposed and demonstrated for surface-normal polarization independent coupling. Benefiting from the perfectly vertical coupling 1 × 4 power splitting/combing scheme, efficient operation was achieved. The efficiency further improved by apodization. According to simulations, 2D apodized can achieve a (CE) of 64.5% (-1.9 dB), low upward back-reflection 8.5% (-11 polarization-dependent loss (PDL) lower than 0.04 dB across wavelength range...
The electrical transport properties of SnO 2 (TiO )/MAPbI 3 (MA = CH NH + ) heterojunction interfaces are investigated from ambient pressure to 20 GPa.
As an electroluminescent device, the coupling relationship between light-emitting diode (LED) input currents, optical power, and LED junction temperature is a complicated multiphysics process. In this paper, simplified photoelectron-thermal (PET) model by artificial neural network (ANN), which can translate field issue into single physics problem, mentioned to study relationship. first, lumens, electric power at different temperatures are monitored in controlling integrating sphere. Then,...
Light extraction effects of a photonic crystal slab with micrometer scale lattice constant are studied. A GaN light emitting diode (LED) is fabricated. The and the enhancement mechanism investigated. From theoretical analysis, it found that characteristics LED emission modulated by slab. Experimental results show intensity enhanced 38% due to guide mode extracting crystal.
Compared with the performance evolution of silicon optical modulators, photonic packaging problem deserves more attention as a big obstacle commercial applications. Edge couplers only have submicron-misalignment tolerance, while conventional grating need angle polishing in fiber packaging. To achieve low-cost packaging, strong misalignment-tolerant modulator is proposed and demonstrated surface normal interface. Benefit from particular characteristics bidirectional structure, can operate...
A two-dimensional grating coupler (2D GC) with four access waveguides is proposed and demonstrated for polarization independent perfectly vertical coupling. Benefitting from the coupling <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$1\times 4$ </tex-math></inline-formula> power splitting/combing scheme, broadband operation can be achieved. Through apodization etched square holes, a simulated efficiency...
We propose and numerically demonstrate an 800 Gbps silicon photonic transmitter with sub-decibel surface-normal optical interfaces. The is composed of eight Mach-Zehnder modulators interleaved AMMI WDM device. This device comprises two 1 × 4 angled MMI a interferometer (MZI) interleaver apodized bidirectional grating which has about -0.5 dB coupling loss. Both the electro-optical MZI regard coupler as vertical 3-dB power splitter/combiner. By importing S-parameter matrices all components...
In the InP/InGaAs/InP PIN photodetector material growth, zinc is a normal doping ion and it has high diffusion coefficient in InP InGaAs. The Zn depth at p-InP intrinsic InGaAs boundary critical for photodiode frequency characteristics. We control into layer by reducing growth temperature of p-type InP, decreasing concentration InGaAs/InP boundary, increasing rate p-InP. derive exact voltage-controlled capacitance expressions as function layer. This work reveals that RC bandwidth p-doping...
We propose and experimentally demonstrate a vertical fiber interfacing interleaved angled multimode interference (MMI) coupler for wavelength-division multiplexing (WDM) applications. This four-channel WDM device comprises two <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mn>1</mml:mn> </mml:mrow> <mml:mo>×</mml:mo> <mml:mn>2</mml:mn> </mml:math> MMI couplers bidirectional grating-based Mach–Zehnder interferometer (MZI)...
An electrically tunable grating coupler is designed and numerically demonstrated. With a lateral p-i-n diode embedded, the optical spectrum of coupling efficiency can be tuned with applied voltage. To simulate spectra response bias voltage, simulation electrical are carried out commercial software Lumerical Finite-Difference Time-Domain Solutions Synopsys Sentaurus TCAD. Due to dual effect shift loss, greatly modulated. voltage 2 V, resulting 47.5 nm peak at wavelength center modulated from...