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408 Gbit/s PAM-8 sidewall-doped germanium-silicon photodetector

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Photonics Research 2023年第6期11卷 961-967页

作者： xiao hu DINGYI WU YE LIU DAIGAO CHEN LEI WANG XI xiao SHAOhuA YU State Key Laboratory of Optical Communication Technologies and Networks Wuhan Research Institute of Posts&Telecommunications(WRI)Wuhan 430074China National Information Optoelectronics Innovation Center Wuhan 430074China Peng Cheng Laboratory Shenzhen 518055China

Based on the 90 nm silicon photonics commercial foundry,sidewall-doped germanium-silicon photodetectors(PDs)are designed and fabricated.The large designed overlap between the optical field and electric field achieves high responsivity while retaining high-speed performance.Even including the loss due to optical fiber coupling,the PD demonstrates an external responsivity greater than 0.55 A/W for transverse magnetic(TM)polarization and 0.65 A/W for transverse electric(TE)polarization at 1530 nm.A flat responsivity spectrum of>0.5 A/W is achieved up to 1580 nm for both polarizations.Their internal responsivities can exceed 1 A/W in the C+L optical communication bands.Furthermore,with the aid of a 200 mm wafer-level test and analysis,the overall PDs of 26 reticles have a 3 dB optoelectrical bandwidth>50 GHz and a dark current<10 nA at a-3 V bias voltage.Finally,the eye diagram performances under TE and TM polarizations,various modulation formats,and different input wavelengths are comprehensively investigated.The clear open electrical eye diagrams up to 120,130,140,and 150 Gbit/s nonreturn-to-zero are experimentally attained at a photocurrent of 1 m A.To the best of our knowledge,this is the first time that single-lane direct detection of record-high-speed 200,224,256,and290 Gbit/s four-level pulse amplitude modulation(PAM)and 300,336,384,and 408 Gbit/s eight-level PAM optical signals has been experimentally achieved.

关键词： Gbit/s polarization transverse

62 GHz germanium photodetector with inductive gain peaking electrode for photonic receiving beyond 100 Gbaud

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Journal of Semiconductors 2021年第2期42卷 17-19页

作者： Dingyi Wu xiao hu Weizhong Li Daigao Chen Lei Wang Xi xiao Wuhan Research Institute of Posts and Telecommunications(WRI) Wuhan 430074China National Information Optoelectronics Innovation Center China Information and Communication Technologies Group Corporation(CICT)Wuhan 430074China

Silicon photonics has attracted a great deal of interest for integrated photonics systems due to its large-scale electronics-photonics integration on a chip by leveraging the fabrication process of the complementary-metal-oxide semiconductor(CMOS)foundries[1−5].Germanium-on-silicon(Ge-on-Si)waveguide photodetector(PD)is an indispensable building block of silicon photonics technology which requires high sensitivity.

关键词： waveguide beyond inductive

数字消费主义陷阱下消费主体的身份困境和破解路径

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南通大学学报（社会科学版） 2024年第3期40卷 31-40页

作者：陈文怡胡小君苏州大学马克思主义学院苏州大学中国特色城镇化研究中心、新型城镇化与社会治理协同创新中心

西方消费主义思潮的盛行,特别是消费逐渐与数字定制、数字化虚拟以及数据圈地相联系,使得消费异化为资本的剥削工具。数字消费主义所制造的消费迷雾,使得消费主体陷入身份焦虑、消费危机以及情感异化等困境之中,成为无益于数字消费社会... 详细信息

西方消费主义思潮的盛行,特别是消费逐渐与数字定制、数字化虚拟以及数据圈地相联系,使得消费异化为资本的剥削工具。数字消费主义所制造的消费迷雾,使得消费主体陷入身份焦虑、消费危机以及情感异化等困境之中,成为无益于数字消费社会的数字消费主体。基于数字消费的剥削本质,需要从劳动属性、劳动价值以及数字消费拜物教的马克思政治经济学逻辑,对消费主体身份进行政治解构,对消费主体的身份困境进行深入追问和研究。化解数字消费主体的身份危机,必须建立和维护好数字消费、防范数字资本的无限扩张、重塑数字技术应用的消费认知以及树立科学的数字消费格局。

关键词：数字消费主义数字化虚拟消费主体身份困境

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秦“道”制起源新论

西北师大学报（社会科学版） 2024年第1期61卷 66-76页

作者：胡小鹏杨彦鹏西北师范大学历史文化学院甘肃兰州730070

战国时期,秦国在统一进程中,根据被征服地区的顺逆程度,对新征服的非秦族群地区采取置郡县直辖和设立附属臣邦两种模式。秦属臣邦在保留原有“王侯君长”的同时,设置官员进行监督导化,秦“道”制即起源于臣邦中的“道官”系统,并在臣邦... 详细信息

战国时期,秦国在统一进程中,根据被征服地区的顺逆程度,对新征服的非秦族群地区采取置郡县直辖和设立附属臣邦两种模式。秦属臣邦在保留原有“王侯君长”的同时,设置官员进行监督导化,秦“道”制即起源于臣邦中的“道官”系统,并在臣邦秦制化的过程中得到完善,发展为管理非华夏族群地区的与县平级的地方行政机构。从秦简文与封泥材料看,“道”即“導”,“道”制本意就是导化蛮夷,与交通道路无关。臣邦与“道”的主官为“丞”,意为辅佐,隐含“導”义,与县、都官主官称呼有别。

关键词：秦国秦王朝臣邦 “道”制丞

连续竞价拍卖中羊群行为的驱动机理与逆向选择——基于阿里司法拍卖样本的实证研究

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中国地质大学学报（社会科学版） 2024年第3期24卷 114-129页

作者：胡晓鹏刘子源上海社会科学院世界经济研究所上海200020

本文聚焦于在线拍卖的竞价行为,通过引入关联价值定义,深入研究了在线拍卖市场中理性与非理性羊群行为的微观发生机制,并运用变量加总的循环推导分析方法,构造出拍品在网络拍卖中的市场需求曲线,分解出羊群行为在资源配置中的规模效应... 详细信息

本文聚焦于在线拍卖的竞价行为,通过引入关联价值定义,深入研究了在线拍卖市场中理性与非理性羊群行为的微观发生机制,并运用变量加总的循环推导分析方法,构造出拍品在网络拍卖中的市场需求曲线,分解出羊群行为在资源配置中的规模效应与结构效应。研究发现,羊群行为不仅会提高拍品成交价格,更会对高质量买家产生一定的挤出效应。依据理论分析结果,以阿里司法拍卖实际竞价数据为样本的实证研究表明,连续竞价拍卖中的羊群行为具有一定的内生性,难以完全规避,而且羊群行为会导致在线拍卖市场出现一定的逆向选择问题。因此,要想做大做强中国在线拍卖市场,必须加大对羊群行为的监测、评估和治理,相关部门积极引导网拍平台发挥大数据优势,通过完善信用机制提高在线拍卖市场的有效竞争水平。

关键词：连续竞价在线拍卖羊群行为逆向选择

Pattern Recognition of Thermal Analysis Cooling Curves and Quality Evaluation of Melt Cast Alloys

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Journal of Materials Science & Technology 2001年第1期17卷 73-74页

作者： Yanxiang LI xiao hu Xuerong XU Dept.of Mechanical Eng. Tsinghua UniversityBeijing 100084China

The development of thermal analysis techniques for evaluation of cast alloy melt quality and its current applications in the foundry were reviewed. The characteristics of the current thermal analysis techniques were analyzed. A new comprehensive method for cooling curve recognition has been proposed. The evaluation of cast alloy melt quality was realized.

关键词： Quality Evaluation Cooling Curves thermal analysis cooling curve recognition comprehensive method alloy melt

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直流电压下局部放电数值模拟方法研究综述

绝缘材料 2024年第4期57卷 1-12页

作者：陈芳荣娜胡晓贵州大学电气工程学院贵州贵阳550025 浙江大学电气工程学院浙江杭州310027 浙江天际互感器股份有限公司浙江衢州324100

本文分别介绍了直流电压下局部放电数值模拟的三电容模型、电导模型以及等离子体模型的建模方法和优缺点,梳理了近年来国内外学者运用这3种模型取得的研究成果。对近年来直流电压下局部放电测试方面的研究进行了归纳整理,总结了温度、... 详细信息

本文分别介绍了直流电压下局部放电数值模拟的三电容模型、电导模型以及等离子体模型的建模方法和优缺点,梳理了近年来国内外学者运用这3种模型取得的研究成果。对近年来直流电压下局部放电测试方面的研究进行了归纳整理,总结了温度、绝缘材料、电压谐波、大气压以及绝缘缺陷等因素对直流电压下局部放电特性的影响。最后讨论了当前数值模拟方法研究中仍然存在的不足,展望了今后研究需要继续深入的方向。

关键词：直流电压局部放电三电容模型电导模型等离子体模型

Progress and realization platforms of dynamic topological photonics

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Chinese Physics B 2024年第1期33卷 75-87页

作者：闫秋辰马睿胡小永龚旗煌 State Key Laboratory for Mesoscopic Physics&Department of Physics Collaborative Innovation Center of Quantum Matter&Frontiers Science Center for Nano-optoelectronicsBeijing Academy of Quantum Information SciencesPeking UniversityBeijing 100871China Peking University Yangtze Delta Institute of Optoelectronics Nantong 226010China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

Dynamic topological photonics is a novel research field, combining the time-domain optics and topological physics.In this review, the recent progress and realization platforms of dynamic topological photonics have been well introduced.The definition, measurement methods and the evolution process of the dynamic topological photonics are demonstrated to better understand the physical diagram. This review is meant to bring the readers a different perspective on topological photonics, grasp the advanced progress of dynamic topology, and inspire ideas about future prospects.

关键词： dynamic topological photonics optical waveguide array topological optical lattice ultrafast spectroscopy

Measuring small longitudinal phase shifts via weak measurement amplification

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Chinese Physics B 2024年第3期33卷 105-111页

作者：徐凯胡晓敏胡孟军王宁宁张超黄运锋柳必恒李传锋郭光灿张永生 CAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China CAS Center For Excellence in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China Beijing Academy of Quantum Information Sciences Beijing 100193China

Weak measurement amplification,which is considered as a very promising scheme in precision measurement,has been applied to various small physical quantities estimations.Since many physical quantities can be converted into phase signals,it is interesting and important to consider measuring small longitudinal phase shifts by using weak measurement.Here,we propose and experimentally demonstrate a novel weak measurement amplification-based small longitudinal phase estimation,which is suitable for polarization interferometry.We realize one order of magnitude amplification measurement of a small phase signal directly introduced by a liquid crystal variable retarder and show that it is robust to the imperfection of interference.Besides,we analyze the effect of magnification error which is never considered in the previous works,and find the constraint on the magnification.Our results may find important applications in high-precision measurements,e.g.,gravitational wave detection.

关键词： weak measurement phase estimation quantum optics