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Thermally tunable GeSi electro-absorption modulator with a wide effective operating wavelength range

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光子学研究:英文版 2023年第8期11卷 1474-1483页

作者： yuFEI LIU JIALIANG SUN XINyu LI SHUXIAO WANG WENCHENG yuE YAN CAI mingbin yu National Key Laboratory of Materials for Integrated Circuits Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China University of Chinese Academy of Sciences Beijing 100049China Shanghai IndustrialμTechnology Research Institute Shanghai 201800China

We demonstrate a GeSi electro-absorption modulator with on-chip thermal tuning for the first time,to the best of our *** simulation proves that the device temperature can be tuned and the effective operating wavelength range can be *** the heater power is 4.63 mW,the temperature of the waveguide increases by about 27 K and the theoretical operating wavelength range is broadened by 23.7 *** experimental results show that the optical transmission line shifted to the longer wavelength by 4.8 nm by every 1 mW heater *** effective static operating wavelength range of the device is increased from 34.4 nm to 60.1 nm,which means it is broadened by 25.7 *** band edge shift coefficient of 0.76 nm/K is obtained by temperature simulation and linear fitting of the measured *** device has a 3 dB EO bandwidth of 89 GHz at 3 V reverse bias,and the eye diagram measurement shows a data rate of 80 Gbit/s for non-return-to-zero on–off keying modulation and 100 Gbit/s for 4 pulse amplitude modulation in the 1526.8 nm to 1613.2 nm wavelength range as the heater power increases from 0 mW to 10.1 mW.

关键词： modulator tunable waveguide

Real-time transition dynamics and stability of chipscale dispersion-managed frequency microcombs

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Light(Science & Applications) 2020年第1期9卷 1520-1529页

作者： Yongnan Li Shu-Wei Huang Bowen Li Hao Liu Jinghui Yang Abhinav Kumar Vinod Ke Wang mingbin yu Dim-Lee Kwong Hui-Tian Wang Kenneth Kin-Yip Wong Chee Wei Wong Fang Lu Mesoscopic Optics and Quantum Electronics Laboratory University of CaliforniaLos AngelesCA 90095USA School of Physics and The MOE Key Laboratory of Weak Light Nonlinear Photonics Nankai UniversityTianjinChina Department of Electrical Computer and Energy EngineeringUniversity of Colorado BoulderBoulderCO 80309USA Department of Electrical and Electronic Engineering The University of Hong KongHong KongChina Institute of Microelectronics A*STARSingapore 117865Singapore

Femtosecond mode-locked laser frequency combs have served as the cornerstone in precision spectroscopy,alloptical atomic clocks,and measurements of ultrafast *** frequency microcombs based on nonlinear microresonators have been examined,exhibiting remarkable precision approaching that of laser frequency combs,on a solid-state chip-scale platform and from a fundamentally different physical *** recent successes,to date,the real-time dynamical origins and high-power stabilities of such frequency microcombs have not been fully ***,we unravel the transitional dynamics of frequency microcombs from chaotic background routes to femtosecond mode-locking in real time,enabled by our ultrafast temporal magnifier metrology and improved stability of dispersion-managed dissipative *** our dispersion-managed oscillator,we further report a stability zone that is more than an order-of-magnitude larger than its prior static homogeneous counterparts,providing a novel platform for understanding ultrafast dissipative dynamics and offering a new path towards high-power frequency microcombs.

关键词： dispersion stability dynamics

Enhanced single photon emission in silicon carbide with Bull's eye cavities

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Chinese Physics B 2022年第10期31卷 159-164页

作者： Xing-Hua Liu Fang-Fang Ren Jiandong Ye Shuxiao Wang Wei-Zong Xu Dong Zhou mingbin yu Rong Zhang Youdou Zheng Hai Lu School of Electronic Science and Engineering Nanjing UniversityNanjing 210023China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China

The authors demonstrate a Bull's eye cavity design that is composed of circular Bragg gratings and micropillar optical cavity in 4H silicon carbide(4H-SiC) for single photon emission. Numerical calculations are used to investigate and optimize the emission rate and directionality of emission. Thanks to the optical mode resonances and Bragg reflections,the radiative decay rates of a dipole embedded in the cavity center is enhanced by 12.8 times as compared to that from a bulk 4H-SiC. In particular, a convergent angular distribution of the emission in far field is simultaneously achieved, which remarkably boost the collection efficiency. The findings of this work provide an alternative architecture to manipulate light-matter interactions for achieving high-efficient SiC single photon sources towards applications in quantum information technologies.

关键词： single photon sources 4H-SiC Bull's eye cavities color centers

Stimulated generation of deterministic platicon frequency microcombs

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Photonics Research 2022年第8期10卷 1877-1885页

作者： HAO LIU SHU-WEI HUANG WENTING WANG JINGHUI YANG mingbin yu DIM-LEE KWONG PIERRE COLMAN CHEE WEI WONG Fang Lu Mesoscopic Optics and Quantum Electronics Laboratory University of California Los AngelesLos AngelesCalifornia 90095USA Department of Electrical Computerand Energy EngineeringUniversity of Colorado BoulderBoulderColorado 80309USA Institute of Microelectronics SingaporeSingapore Universitéde Bourgogne Franche-Comté ICBUMR CNRS 6303DijonFrance

Dissipative Kerr soliton generation in chip-scale nonlinear resonators has recently observed remarkable advances,spanning from massively parallel communications, to self-referenced oscillators, and to dual-comb *** working in the anomalous dispersion regime, unique driving protocols and dispersion in these nonlinear resonators have been examined to achieve the soliton and soliton-like temporal pulse shapes and coherent frequency comb generation. The normal dispersion regime provides a complementary approach to bridge the nonlinear dynamical studies, including the possibility of square pulse formation with flattop plateaus, or *** we report observations of square pulse formation in chip-scale frequency combs through stimulated pumping at one free spectral range and in silicon nitride rings with +55 fs~2∕mm normal group velocity *** of the platicon frequency comb via a varied sideband modulation frequency is examined in both spectral and temporal measurements. Determined by second-harmonic autocorrelation and cross correlation, we observe bright square platicon pulse of 17 ps pulse width on a 19 GHz flat frequency comb. With auxiliary-laser-assisted thermal stabilization, we surpass the thermal bistable dragging and extend the mode-locking access to narrower 2 ps platicon pulse states, supported by nonlinear dynamical modeling and boundary limit discussions.

关键词： pumping soliton dispersion

PABP-driven secondary condensed phase within RSV inclusion bodies activates viral mRNAs for ribosomal recruitment

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Virologica Sinica 2024年第2期39卷 235-250页

作者： Qiang Zhang Hanzhe Ye Cong Liu Haiwu Zhou mingbin He Xiaodong Liang yu Zhou Kun Wang Yali Qin Zhifei Li Mingzhou Chen State Key Laboratory of Virology and Modern Virology Research Center College of Life SciencesWuhan UniversityWuhan430072China Taikang Center for Life and Medical Sciences Wuhan UniversityWuhan430072China Hubei Jiangxia Laboratory Wuhan430200China

Inclusion bodies(IBs)of respiratory syncytial virus(RSV)are formed by liquid-liquid phase separation(LLPS)and contain internal structures termed“IB-associated granules”(IBAGs),where anti-termination factor M2-1 and viral mRNAs are ***,the mechanism of IBAG formation and the physiological function of IBAGs are ***,we found that the internal structures of RSV IBs are actual M2-1-free viral messenger ribonucleoprotein(mRNP)condensates formed by secondary ***,the RSV nucleoprotein(N)and M2-1 interact with and recruit PABP to IBs,promoting PABP to bind viral mRNAs transcribed in IBs by RNArecognition motif and drive secondary phase ***,PABP-eIF4G1 interaction regulates viral mRNP condensate composition,thereby recruiting specific translation initiation factors(eIF4G1,eIF4E,eIF4A,eIF4B and eIF4H)into the secondary condensed phase to activate viral mRNAs for ribosomal *** study proposes a novel LLPS-regulated translation mechanism during viral infection and a novel antiviral strategy via targeting on secondary condensed phase.

关键词： Respiratory syncytial virus(RSV) Inclusion bodies(IBs) Biomolecular condensates Liquid-liquid phase separation(LLPS) Secondary condensed phase mRNA activation

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半散放条件下普通斑马的种群特征

兽类学报 2014年第4期34卷 419-422页

作者：迟俊徐晖于明斌大连森林动物园大连116013

普通斑马又称平原斑马（Equus burchelli）,隶属于奇蹄目马科,是一种极具观赏价值的大型哺乳动物。广泛分布于非洲,喜欢栖息在平原和草原,随季节和食物迁徙。普通斑马是社会性动物,习惯群体生活,规模较小的群体由1只雄性和2-6只雌性以... 详细信息

普通斑马又称平原斑马（Equus burchelli）,隶属于奇蹄目马科,是一种极具观赏价值的大型哺乳动物。广泛分布于非洲,喜欢栖息在平原和草原,随季节和食物迁徙。普通斑马是社会性动物,习惯群体生活,规模较小的群体由1只雄性和2-6只雌性以及它们未成年的子女组成;或是由十几只未成年的雄性普通斑马组成;较大的群体则有几百只,它们通常是由若干个小规模的群体组成。

关键词：普通斑马首次繁殖年龄种群结构生育间隔

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多孔硅吸附染料分子的荧光增强效应

光学学报 1999年第4期19卷 562-566页

作者：李永放魏昂余明斌王燕陕西师范大学物理系西安理工大学理学院

报道了利用多孔硅独特的表面特性，吸附染料分子后，使得染料的荧光得到很大的增强，并观察到了这种吸附过程中彼此间的能量转移过程。对染料的荧光增强机理及实验结果进行了讨论。

关键词：多孔硅吸附染料分子荧光增强效应能量转移

SiGeC/Si功率二极管的数值模拟与分析

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Journal of Semiconductors 2006年第6期27卷 1068-1072页

作者：高勇刘静马丽余明斌西安理工大学电子工程系西安710048 西安理工大学应用物理系西安710048

将SiGeC技术应用于功率半导体器件的特性改进,提出了一种新型p+(SiGeC)n-n+异质结功率二极管结构.在分析SiGeC合金材料物理特性的基础上,给出了该结构的关键物理参数模型,并在此基础上利用MEDICI模拟,对比分析了C的引入对器件各种电特... 详细信息

将SiGeC技术应用于功率半导体器件的特性改进,提出了一种新型p+(SiGeC)n-n+异质结功率二极管结构.在分析SiGeC合金材料物理特性的基础上,给出了该结构的关键物理参数模型,并在此基础上利用MEDICI模拟,对比分析了C的引入对器件各种电特性的影响.此外,还模拟比较了不同p+区厚度对器件反向漏电流的影响.结果表明:在SiGe/Si功率二极管中加入少量的C,在基本不影响器件正向I V特性和反向恢复特性的前提下,大大减少了器件的反向漏电流,并且C的加入还减小了器件特性对材料临界厚度的依赖性,提高了器件稳定性.

关键词： SiGeC/Si异质结功率二极管反向恢复漏电流

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低温排液管道气封高度的计算

低温与特气 2016年第4期34卷 12-15页

作者：于明彬液化空气(杭州)有限公司浙江杭州310012

通过理论分析,对低温排液管道气封高度的确定给出了计算方法,并选定计算参数进行了计算,分析了影响液柱高度的因素,设计者可以参考该计算方法并结合确定的各种参数来确定气封的高度,以免造成低温管道跑冷结霜,降低设备的运行效率,甚至... 详细信息

通过理论分析,对低温排液管道气封高度的确定给出了计算方法,并选定计算参数进行了计算,分析了影响液柱高度的因素,设计者可以参考该计算方法并结合确定的各种参数来确定气封的高度,以免造成低温管道跑冷结霜,降低设备的运行效率,甚至危及设备的安全运行。

关键词：低温管道排液气封