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Model Development of p-i-n Germanium Devices for Infrared Detection

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Optics and Photonics Journal 2018年第6期8卷 201-211页

作者： Caitlin R. Philippi John W. Zeller Nibir K. Dhar Priyalal Wijewarnasuriya Ashok K. Sood Harry Efstathiadis State University of New York Polytechnic Institute Albany NY USA Magnolia Optical Technologies Inc. Woburn MA USA US Army Night Vision & Electronic Sensors Directorate Fort Belvoir VA USA US Army Research Laboratory Adelphi MD USA

Germanium offers many benefits over groups III-V materials when used for infrared detection. Most importantly, germanium is compatible with Complementary Metal Oxide Semiconductor (CMOS) manufacturing which allows for a low-cost, high-throughput device, and it does not require cooling, which many III-V devices do. With the deposition of germanium directly on silicon, there will be a thermally induced strain due to the difference in thermal expansion coefficients between the two materials. When a biaxial tensile strain is present, the direct bandgap of germanium is lowered to ~0.77 eV and is capable of absorbing longer wavelengths. We have used a two-step deposition process to create a strained germanium film in order to fabricate a photodetector device. Our device has a dark current of 1.35 nA and a photocurrent of 22.5 nA at 1570 nm wavelength. Next, we developed a model in order to compare theoretical results with experimental results. The results indicate that the model is in close agreement with our measured data, and we are therefore able to use it to model future devices.

关键词： Infrared Detection Germanium photodetector Model TCAD

Double Beams to Measure Three-dimensional Rigid Body Displacements

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Semiconductor Photonics and Technology 1997年第2期3卷 78-81页

作者： ZHOU Jian,CHEN Wenyi,ZHAO Hong TIAN Feng,TAN Yushan (Research Institute for Laser and Infrared Applications,Xi’an Jiaotong University,Xi’an 710049,CHN)

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关键词： Displacements Measurement photodetector PSD

Detecting Ultra-Violet Radiation by Using Titanium Dioxide Nanoparticles

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Soft Nanoscience Letters 2012年第3期2卷 29-33页

作者： Naser Hatefi Kargan Mousa Aliahmad Samereh Azizi Department of Physics Faculty of Sciences University of Sistan and Baluchestan Zahedan Iran

In this paper sensitivity of chemically synthesized titanium dioxide (TiO2) nanoparticles to ultra-violet (UV) radiation is investigated. For this purpose three types of ultra-violet photodetectors were fabricated, one with as-synthesized TiO2 nanoparticles, another one with TiO2 nanoparticles annealed at 600℃, and the third one with TiO2 nanoparticles annealed at 800℃. In each case the annealing time duration was one hour. The photodetectors were fabricated on glass slides where on them a thin layer of fluorine doped tin oxide (FTO) was deposited by spray pyrolysis. The results show that all photodetectors are sensitive to UV radiation where the photodetectors fabricated from annealed TiO2 nanoparticles are more sensitive than the photodetectors fabricated from as-synthesized TiO2 nanoparticles.

关键词： Ultra-Violet photodetector Titanium Dioxide Nanocrystals Nanoparticles

An experiment to estimate the revolution of DC motor

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Journal of Measurement Science and Instrumentation 2013年第1期4卷 10-13页

作者： N K Acharya A N Prajapati Applied Physics Department Faculty of Technology and EngineeringThe Maharaja Sayajirao University of BarodaVadodara-390001India

In this paper we have reported a simple and cost effective lab level experiment to determine the revolution of DC motor at various *** experiment is designed on the basis of laser light pulses observed in cathode ray oscilloscope(CRO)output through an *** output waveforms are directly related with the revolution of DC motor.A laser light beam was allowed to pass through a slot attached with the shaft of DC *** outcoming light is in the form of light pulses that falls on the photodetector which was connected to *** frequency of light pulses is the function of applied voltage to DC *** CRO output was measured at different *** visual waveforms on CRO interpret the different values of revolutions per minute(rpm)at different values of voltages given to DC *** was made to determine the voltage depended revolution.

关键词： cathode ray oscilloscope(CRO) revolution DC motor laser source photodetector

A Simple Detection System for Two Classical Sagnac Interferometer Configurations

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Engineering（科研） 2012年第12期4卷 903-907页

作者： Gabriel Eduardo Sandoval-Romero Enrique Francisco Pinzón-Escobar Centro de Ciencias Aplicadas y Desarrollo Tecnológico Universidad Nacional Autónoma de México México

Two interferometric systems were built, one in bulk optics and other one in fiber optics for showing the instrumentation stage designed for these devices, supported in a photodetector. This stage has a circuit for amplification, analog filtering and software for single channel data acquisition and digital filtering. Based on the Sagnac effect in bulk optics and in fiber optics, the Sagnac interferometer has many applications, nevertheless the methods of construction, design and instrumentation for the sensors used on both types of interferometers are well-known, but very common or general form, for this reason this work approaches some of the methodologies for the design and construction of these devices, obtaining higher sensitivity and better contribution in its respective interferometric paths. We used the simplest design for each interferometer, proposing the best detection limit for each one;to obtain the previous thing, we implement the three previous steps: amplifiers and analogous filters, software for filtering the digital sign. The data acquisition method used to allow us to obtain faster results, using the card of a PC, getting real time measurements and digital processing of the signal.

关键词： Sagnac Interferometer Instrumentation photodetector Data Acquisition

Recent Research and Development on Photonic Feeding Antennas

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Recent Research and Development on Photonic Feeding Antennas

重庆研究院等三维石墨烯异质结光电探测器件研究获进展

2002海峡两岸三地无线科技研讨会

作者： Keren LI Masayuki IZUTSU Basic And Advanced Research Division Communications Research Laboratory （CRL） 4-2-1 Nukui-Kitamachi Koganei-shi Tokyo 184-8795 Japan Basic And Advanced Research Division Communications Research Laboratory （CRL） 4-2-1 Nukui-Kitamachi Koganei-shi Tokyo 184-8795 Japan

In this paper, we presented our recent works on the development of photonic feeding coplanar patch antennas for microwave and millimeter-wave wireless communication system. An experiment setup for opt

关键词： high output photodetection photodetector photonic feeding antenna coplanar patch antenna (CPA) radio-over-fiber

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人工晶体学报 2017年第8期46卷 1479-1479页

近日,中国科学院重庆绿色智能技术研究院微纳制造与系统集成研究中心与香港中文大学、电子科技大学和重庆理工大学合作,在基于硅表面的三维石墨烯原位生长技术上,取得高性能异质结光电探测器方面的研究进展,

关键词：石墨烯异质结光电探测器件重庆研究院原位生长 photodetector Schottky 硅表面系统集成电子科技大学

Electromagnetic wave-induced photoelectric effect for sensitive THz detection

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Science Foundation in China 2016年第2期24卷 18-18页

With the support by the National Natural Science Foundation of China and the Ministry of Science and Technology of China,the research team led by *** Zhiming(黄志明)and Academician Chu Junhao(褚君浩)at the National La... 详细信息

关键词： Academician 黄志明 Infrared photoelectric terahertz electronics extreme hypersensitive photodetector symmetrical

Enhanced photocurrent generation in twisted bilayer graphene

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Science Foundation in China 2016年第3期24卷 23-23页

With the support by the National Natural Science Foundation of China,the National Basic Research Program of China,and Beijing Municipal Science and Technology Commission,the research team led by *** Zhongfan(刘忠范)and *** Hailin(彭海琳)at the Center for Nanochemistry,College of Chemistry and Molecular Engineering,Peking University,developed a high-performance

关键词： photodetector Peking twisted folds monolayer interlayer spatially optoelectronic realization metallic