Explanipedia

Adiabaticity Engineered Silicon Coupler With Design-Intended Splitting Ratio Open

Chih‐Hsien Chen, Yu-Fang Lo, Guan-Xun Lu, Yung‐Jr Hung, Shuo‐Yen Tseng · 2024

We design and experimentally demonstrate compact and robust adiabaticity engineered couplers (AECs) with design intended splitting ratios (SRs) for the silicon-on-insulator platform. Adiabatic couplers (ACs) with variable SRs can be design…

Miniaturization of Interferometric Optical Gyroscopes: A Review Open

Francesco Dell’Olio, Teresa Natale, Yen‐Chieh Wang, Yung‐Jr Hung · 2023

Gyroscopes are inertial sensors whose field of application is rapidly expanding. The growing interest in autonomous systems, CubeSats as well as their constellations, and unmanned vehicles is stimulating a strong interest in miniaturized g…

Adiabaticity Engineered Silicon Polarization Independent 3-dB Coupler for the O-Band Open

Hung-Ching Chung, Chih‐Hsien Chen, Guan-Xun Lu, Yung‐Jr Hung, Shuo‐Yen Tseng · 2023

We demonstrate a compact and broadband polarization independent 3-dB coupler for the O-band on silicon-on-insulator platform. Using the multi-parameter adiabaticity engineering protocol, unwanted coupling between eigenmodes in mode evoluti…

Compact polarization-independent quasi-adiabatic 2×2 3 dB coupler on silicon Open

Hung-Ching Chung, Chih‐Hsien Chen, Yung‐Jr Hung, Shuo‐Yen Tseng · 2021

We demonstrate a quasi-adiabatic polarization-independent 2×2 3 dB coupler based on the silicon-on-insulator platform. Using a quasi-adiabatic taper design for the mode evolution/coupling region, the TE mode evolution is accelerated, and t…

Higher order mode supercontinuum generation in tantalum pentoxide (Ta2O5) channel waveguide Open

Ranran Fan, Yuan-Yao Lin, Lin Chang, Andreas Boes, John E. Bowers , et al. · 2021

High-Power and High-Responsivity Avalanche Photodiodes for Self-Heterodyne FMCW Lidar System Applications Open

Zohauddin Ahmad, Yan-Min Liao, Sheng-I Kuo, You-Chia Chang, Rui-Lin Chao , et al. · 2021

In this work, we demonstrate the high-power and high-responsivity performance of the dual multiplication (M-) layers in In_0.52Al_0.48As based avalanche photodiode (APD). The dual M-layer design in our APD structure eff…

Nonlinear and low-loss tantalum pentoxide based micro-ring resonator by ion-assisted electron-beam deposition Open

Yi-Jen Chiu, Fu-Yan Yan, Jia Wei Liu, Jia‐Chi Lan, Te-Keng Wang , et al. · 2020

Tantalum pentoxide (Ta 2 O 5 ) is a promising material for optical waveguide applications of photonics integration due to its excellent linear and nonlinear optical properties, such as high refractive index, large bandgap, and high nonline…

Robust silicon arbitrary ratio power splitters using shortcuts to adiabaticity Open

Hung-Ching Chung, Tai-Chun Wang, Yung‐Jr Hung, Shuo‐Yen Tseng · 2020

We design and fabricate a series of broadband silicon arbitrary power splitters with various split ratios using shortcuts to adiabaticity. In this approach, the system evolution is designed using the decoupled system states, and the desire…

Low-loss polysilicon subwavelength grating waveguides and narrowband Bragg reflectors in bulk CMOS Open

Yung‐Jr Hung, Cheng-Tse Tang, Tse-Hung Chen, Tzu-Hsiang Yen, Ming-Ju Tsai , et al. · 2020

The performance of a photonic functional device in bulk CMOS has been limited by the high propagation loss in polysilicon strip waveguide. Based on the zero-process-change methodology, we successfully reduce the propagation loss of polysil…

Electrocatalytic Oxygen Evolution: Discontinuity‐Enhanced Thin Film Electrocatalytic Oxygen Evolution (Small 50/2019) Open

Ming‐Chi Shih, Ren‐Huai Jhang, Ya‐Ting Tsai, Chia‐Wei Huang, Yung‐Jr Hung , et al. · 2019

Discontinuous cobalt manganese oxyhydroxide (CMOH) film shows much higher atom efficiency and performance in the oxygen evolution reaction (OER) than the completely continuous ones. In article number 1903363, Jiaxing Huang, and Chun-Hu Che…

Tantalum pentoxide (Ta<sub>2</sub>O<sub>5</sub>) based athermal micro-ring resonator Open

Chung‐Lun Wu, Yung‐Jr Hung, Ranran Fan, Ding-Hsin Ou, Jen-Yang Huang , et al. · 2019

By analyzing the temperature-dependent transmission spectrum of a Ta2O5 micro-ring resonator, the thermal-optical coefficient at the optical communication wavelength regime has been determined. The temperature-dependent resonance wavelengt…

Optical spectrometer based on continuously-chirped guided mode resonance filter Open

Yung‐Jr Hung, Chia-Wei Kao, Tzu-Chieh Kao, Chia-Wei Huang, Jiajin Lin , et al. · 2018

In this work we introduce a tunable GMR filter based on continuously period-chirped (ΔP = 130 nm) gratings using a Ta₂O₅ waveguide layer with graded thickness (ΔT = 36 nm). The structure of the gradient-period grating…

High-Voltage 12.5-V Backside-Illuminated CMOS Photovoltaic Mini-Modules Open

Yung‐Jr Hung, Yu-Ching Cheng, Meng-Syuan Cai, Chen‐Han Lu, Hsiu-Wei Su · 2017

In this paper, we employed a one-step localized substrate removal (LSR) process to fabricate a backside-illuminated CMOS photovoltaic (PV) mini-module suitable for high-voltage and low-power applications. LSR can be considered an upgrade o…

Effective Synthesis of Highly Oxidized Graphene Oxide That Enables Wafer-scale Nanopatterning: Preformed Acidic Oxidizing Medium Approach Open

Chun‐Hu Chen, Shin Hu, Jyun-Fu Shih, Chang-Ying Yang, Yun-Wen Luo , et al. · 2017

Demand for rapid and massive-scale exfoliation of bulky graphite remains high in graphene commercialization and property manipulation. We report a procedure utilizing “preformed acidic oxidizing medium (PAOM)” as a modified version of the …

Full-color reflectance-tunable filter based on liquid crystal cladded guided-mode resonant grating Open

Chun‐Ta Wang, Hao-Hsiang Hou, Ping-Chien Chang, Cheng‐Chang Li, Hung‐Chang Jau , et al. · 2016

This work proposes a tunable reflective guided-mode resonant (GMR) filter that incorporates a 90° twisted nematic liquid crystal (TNLC). The GMR grating acts as an optical resonator that reflects strongly at the resonance wavelength and as…

Self-phase modulation in highly confined submicron Ta_2O_5 channel waveguides Open

Yuan-Yao Lin, Chung‐Lun Wu, Wen-Chun Chi, Yi‐Jen Chiu, Yung‐Jr Hung , et al. · 2016

Optical spectra broadening as a result self-phase modulation in a channel waveguide fabricated on a high quality tantalum pentoxide (Ta₂O₅) film by using RF sputtering is measured. The full-width at half maximum of th…

Low-loss and high-Q Ta_2O_5 based micro-ring resonator with inverse taper structure Open

Chung‐Lun Wu, Bo-Tsang Chen, Yuan-Yao Lin, Wei-Chen Tien, Gong‐Ru Lin , et al. · 2015

A low-loss and high-Q Ta(2)O(5) based micro-ring resonator is presented. The micro-ring resonator and channel waveguide with core area of the 700 by 400 nm(2) were fabricated on amorphous Ta(2)O(5) thin films prepared by reactive sputterin…

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