Yongqing Huang
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View article: Derivation and Application of a Physics-Based Equivalent Circuit Model for Uni-Traveling-Carrier Photodiodes
Derivation and Application of a Physics-Based Equivalent Circuit Model for Uni-Traveling-Carrier Photodiodes Open
View article: An AI-Driven Framework for the Intelligent Design of High-Performance Photodetectors
An AI-Driven Framework for the Intelligent Design of High-Performance Photodetectors Open
View article: Applying the Elaboration Likelihood Model to Investigate Customer Behavioral Intention: The Case of Agarwood on Social Media Platforms
Applying the Elaboration Likelihood Model to Investigate Customer Behavioral Intention: The Case of Agarwood on Social Media Platforms Open
View article: UV-Vis-NIR Broadband Dual-Mode Photodetector Based on Graphene/InP Van Der Waals Heterostructure
UV-Vis-NIR Broadband Dual-Mode Photodetector Based on Graphene/InP Van Der Waals Heterostructure Open
Dual-mode photodetectors (DmPDs) have attracted considerable interest due to their ability to integrate multiple functionalities into a single device. However, 2D material/InP heterostructures, which exhibit built-in electric fields and ra…
View article: Association between impaired diffusion capacity and small airway dysfunction: a cross-sectional study
Association between impaired diffusion capacity and small airway dysfunction: a cross-sectional study Open
Background Small airway dysfunction (SAD) and impaired diffusion capacity of the lungs for carbon monoxide ( D LCO ) are positively associated with a worse prognosis. Individuals with both dysfunctions have been identified in clinical prac…
View article: Design of high power evanescent quantum dot distributed feedback lasers on Si
Design of high power evanescent quantum dot distributed feedback lasers on Si Open
Great advancements in III–V/Si epitaxy have pushed quantum dot lasers to the forefront of silicon photonics. In this work, we designed the structures of evanescent coupled quantum dot distributed feedback lasers with asymmetric gratings, w…
View article: SNR Enhancement for Comparator-Based Ultra-Low-Sampling Φ-OTDR System Using Compressed Sensing
SNR Enhancement for Comparator-Based Ultra-Low-Sampling Φ-OTDR System Using Compressed Sensing Open
The large amount of sampled data in coherent phase-sensitive optical time-domain reflectometry (Φ-OTDR) brings heavy data transmission, processing, and storage burdens. By using the comparator combined with undersampling, we achieve simult…
View article: Automated intelligent design of modified uni-traveling carrier photodectors
Automated intelligent design of modified uni-traveling carrier photodectors Open
This paper introduces an automatic intelligent design method for the modified uni-traveling carrier photodetector (MUTC-PD). The conventional photodetector design process often relies on the numerical solution of complex nonlinear partial …
View article: Phase transformation mechanism of nominal Si(001) surface driven by hydrogen thermal annealing
Phase transformation mechanism of nominal Si(001) surface driven by hydrogen thermal annealing Open
Herein, we report the phase transformation mechanism of the nominal Si(001) surface driven by hydrogen thermal annealing. The surface energies of H-terminated Si(001) surface with different phase structures were calculated by density funct…
View article: Electrical feedback system for enhancing the RF power of photodetector
Electrical feedback system for enhancing the RF power of photodetector Open
In this paper, we propose a system for enhancing the RF output power of the photodetector, especially the power of fundamental tune and second-order harmonic, by feeding back part of the RF signal through an electrical feedback circuit. As…
View article: A Phase-Sensitive Optical Time Domain Reflectometry with Non-Uniform Frequency Multiplexed NLFM Pulse
A Phase-Sensitive Optical Time Domain Reflectometry with Non-Uniform Frequency Multiplexed NLFM Pulse Open
In the domain of optical fiber distributed acoustic sensing, the persistent challenge of extending sensing distances while concurrently improving spatial resolution and frequency response range has been a complex endeavor. The amalgamation…
View article: φ-OTDR Based on Orthogonal Frequency-Division Multiplexing Time Sequence Pulse Modulation
φ-OTDR Based on Orthogonal Frequency-Division Multiplexing Time Sequence Pulse Modulation Open
This study introduces an innovative phase-sensitive optical time-domain reflectometer (φ-OTDR) technology based on orthogonal frequency-division multiplexing (OFDM) and nonlinear frequency modulation (NLFM) pulse modulation sequences. The …
View article: Design of uni-traveling-carrier photodiode With Nanoscale Optical Microstructures
Design of uni-traveling-carrier photodiode With Nanoscale Optical Microstructures Open
In this article, we report a uni-traveling-carrier photodiode (UTC-PD) incorporating nanoscale optical microstructures. We design a waveguide-based UTC-PD containing an internal optical scattering structure to convert incident light from v…
View article: Design of uni-traveling-carrier photodiode With Nanoscale Optical Microstructures
Design of uni-traveling-carrier photodiode With Nanoscale Optical Microstructures Open
In this article, we report a uni-traveling-carrier photodiode (UTC-PD) incorporating nanoscale optical microstructures. We design a waveguide-based UTC-PD containing an internal optical scattering structure to convert incident light from v…
View article: Modified photodiode equivalent circuit model considering coplanar waveguide electrodes
Modified photodiode equivalent circuit model considering coplanar waveguide electrodes Open
Accurate equivalent circuit models can assist in better analyzing the performance of photodetectors. This study proposes a modified photodiode (PD) equivalent circuit model that considers coplanar waveguide (CPW) electrodes. First, the CPW…
View article: Quantifying Photodiode nonlinear characteristic induced by optical power and Voltage
Quantifying Photodiode nonlinear characteristic induced by optical power and Voltage Open
A new mathematical model, optical-power-dependent model R(P), is proposed by investigating the nonlinearity of modified uni-traveling carrier photodiodes (MUTC-PD). Benefiting from this model, the harmonic power and output 3rd order interc…
View article: Improved performance of InGaAs/AlGaAs quantum well lasers on silicon using InAlAs trapping layers
Improved performance of InGaAs/AlGaAs quantum well lasers on silicon using InAlAs trapping layers Open
InGaAs/AlGaAs multiple quantum well lasers grown on silicon (001) by molecular beam epitaxy have been demonstrated. By inserting InAlAs trapping layers into AlGaAs cladding layers, misfit dislocations easily located in the active region ca…
View article: Design of High-Speed UTC-PD With Optimization of Its Electron Transit Performance and Parasitic Capacitance
Design of High-Speed UTC-PD With Optimization of Its Electron Transit Performance and Parasitic Capacitance Open
An 1500 nm thick collector layer is adopted in the uni-travelling-carrier photodiode (UTC-PD) to reduce the PD's capacitance, while the PD's diameter is set to be 20 μm for better saturation performance and optical coupling characteristic …
View article: Research on Bias Modulation Mechanism of Photodiode
Research on Bias Modulation Mechanism of Photodiode Open
View article: Predicting Risk Factors of Acute Kidney Injury in the First 7 Days after Admission: Analysis of a Group of Critically Ill Patients
Predicting Risk Factors of Acute Kidney Injury in the First 7 Days after Admission: Analysis of a Group of Critically Ill Patients Open
Background. Acute kidney injury (AKI) is a common complication in critically ill patients. Some predictive models have been reported, but the conclusions are controversial. The aim of this study was the formation of nomograms to predict ri…
View article: Length-Dependent Photoelectric Property of ZnO Nanowires
Length-Dependent Photoelectric Property of ZnO Nanowires Open
An interesting phenomenon that the photocurrent (the difference between illumination and dark current) of a ZnO nanowire (NW) under a specified voltage increased as its length increased in a certain range was observed previously and it was…
View article: Association of latent class analysis-derived subphenotypes of acute kidney injury with mortality in critically ill patients with cardiovascular disease: a retrospective cohort study
Association of latent class analysis-derived subphenotypes of acute kidney injury with mortality in critically ill patients with cardiovascular disease: a retrospective cohort study Open
View article: Demonstration of room-temperature continuous-wave operation of InGaAs/AlGaAs quantum well lasers directly grown on on-axis silicon (001)
Demonstration of room-temperature continuous-wave operation of InGaAs/AlGaAs quantum well lasers directly grown on on-axis silicon (001) Open
Room-temperature continuous-wave operation of InGaAs/AlGaAs quantum well lasers directly grown on on-axis silicon (001) has been demonstrated. A 420 nm thick GaAs epilayer completely free of antiphase domains was initially grown on the sil…
View article: Design of Silicon Nitride Edge Coupler for Monolithically Integrated Laser on Silicon Photonic Circuits With Relaxed Alignment Tolerance and High Efficiency
Design of Silicon Nitride Edge Coupler for Monolithically Integrated Laser on Silicon Photonic Circuits With Relaxed Alignment Tolerance and High Efficiency Open
We propose a bi-layer 5-tip edge coupler in a multilayer silicon nitride-on-silicon (SiN-on-Si) waveguide platform. The coupler is used for the integration between a monolithic 1550 nm laser and a single-mode SiN waveguide. The simulated c…
View article: High slope-efficiency quantum-dot lasers grown on planar exact silicon (001) with asymmetric waveguide structures
High slope-efficiency quantum-dot lasers grown on planar exact silicon (001) with asymmetric waveguide structures Open
We report electrically pumped continuous-wave (CW) InAs/GaAs quantum dot lasers directly grown on planar exact silicon (001) with asymmetric waveguide structures. Surface hydrogen-annealing for the GaAs/ Si (001) templates and low-temperat…
View article: Additional file 1 of Association of latent class analysis-derived subphenotypes of acute kidney injury with mortality in critically ill patients with cardiovascular disease: a retrospective cohort study
Additional file 1 of Association of latent class analysis-derived subphenotypes of acute kidney injury with mortality in critically ill patients with cardiovascular disease: a retrospective cohort study Open
Additional file 1: Table S1. The association between each variable and 28-day mortality by univariate logistic regression.
View article: InGaAs/InAlAs SAGCMCT avalanche photodiode with high linearity and wide dynamic range
InGaAs/InAlAs SAGCMCT avalanche photodiode with high linearity and wide dynamic range Open
Linearity is a very important parameter to measure the performance of avalanche photodiodes (APDs) under high input optical power. In this paper, the influence of the absorption layer on the linearity of APDs is carefully studied by using …
View article: Monolithic integration of laser onto multilayer silicon nitride photonic integrated circuits with high efficiency at telecom wavelength
Monolithic integration of laser onto multilayer silicon nitride photonic integrated circuits with high efficiency at telecom wavelength Open
We propose a multilayer silicon nitride (SiN) -on-silicon photonic integrated circuit (PIC) platform with a monolithic laser at the C-band. A tapered edge coupler and a meta-structure-based interlayer directional coupler in the platform we…
View article: Development and Validation of a Nutritional Risk Screening Scale for Stroke Patients
Development and Validation of a Nutritional Risk Screening Scale for Stroke Patients Open
Introduction Stroke is a global health problem, and around 62% of stroke patients suffer from malnutrition due to dysphagia, eating speed, or stress response. This study aimed to develop a Nutritional Risk Screening Scale for Stroke Patien…
View article: Ultrasensitive enhanced fabrication-tolerance refractometer based on PANDA-air-hole microfiber at the birefringent dispersion turning point
Ultrasensitive enhanced fabrication-tolerance refractometer based on PANDA-air-hole microfiber at the birefringent dispersion turning point Open
We present an ultrasensitive enhanced fabrication-tolerance refractometer utilizing the polarimetric interference of a tapered PANDA-air-hole fiber (PAHF). To obtain high birefringence and unique group birefringence, the PAHF is specially …