碲镉汞雪崩焦平面器件

碲镉汞雪崩光电二极管以其高增益、高灵敏度和高速探测的优点成为第3代红外光电探测器的重要发展方向之一.制备了截止波长3.56μm的雪崩光电二极管焦平面器件,面阵规模为16×16.焦平面器件在0～6V偏压下有效像元率大于90%,非均匀性小于20%.6 V偏压下NEPh约为60,过剩噪声因子为1.2.     

MBE生长的PIN结构碲镉汞红外雪崩光电二极管

对中波红外碲镉汞雪崩光电二极管(APD)特性进行理论计算,获得材料的能量散射因子及电离阈值能级与材料特性的相互关系,从而计算器件的理论雪崩增益与击穿电压.通过对材料特性(组分,外延厚度,掺杂浓度等)的优化,设计并生长了适合制备PIN结构红外雪崩光电二极管的碲镉汞材料,并进行了器件验证.结果显示,在10V反偏电压下,该器件电流增益可达335.     

供红外应用的高级碲镉汞光电二极管

本文讨论美国霍尼威尔公司新发展的四种碲镉汞光电二极管:1.2.06微米碲镉汞雪崩光电二极管;2.10.6微米碲镉汞光电二极管;3.R_0A乘积为0.7欧-厘米~2的高D~＊碲镉汞光电二极管(10.6微米);4.半导体致冷10.6微米光混频器。2.06微米雪崩光电二极管是为Q开关的掺钬氟化锂钇(Ho:YLF)激光器发展的。这种器件的雪崩增益为9～36。10.6微米光电二极管的平均量子效率为30％。制备了单元为250微米×250微米的五元线列,其单     

碲镉汞雪崩光电二极管在激光雷达上的应用

首先简要介绍激光雷达的主要军事应用、激光雷达对接收器的性能需求及激光雷达接收器的现状,综述碲镉汞材料特点、碲镉汞雪崩光电二极管探测器特点,与现有激光雷达接收器相比碲镉汞雪崩光电二极管作为激光雷达接收器的优势及制备技术;综述国外碲镉汞雪崩光电二极管用于激光雷达接收器的发展现状;最后分析我国发展用于激光雷达接收器的碲镉汞雪崩光电二极管可行性。     

碲镉汞雪崩光电二极管发展现状

碲镉汞雪崩光电二极管探测器具有高增益、高带宽和低噪声因数的显著特点,具有下一代焦平面探测器阵列的多功能、主动/被动探测、双波段和高灵敏度等理想特性,在低光通量探测、超光谱、二维/三维成像方面显示出强大的应用潜力。本文简要介绍了碲镉汞雪崩光电二极管主要器件结构、特点及应用现状。     

HgCdTe雪崩光电二极管的研究进展

碲镉汞红外雪崩光电二极管(APD)阵列作为最近十多年来发展起来的新型探测器,以其高增益、高灵敏度和高速探测的优点,成为未来微弱信号探测、二维/三维成像、主/被动探测应用的重要器件。本文重点阐述了雪崩光电二极管的基本原理、以及HgCdTe雪崩光电二极管材料和器件的研究,结合应用方向对其研究进展进行了综述性介绍。     

碲镉汞线性雪崩焦平面器件评价及其应用(特邀)

碲镉汞线性雪崩焦平面探测器具有高增益、高带宽及低过剩噪声等特点,在航空航天、天文观测、军事装备及地质勘探等领域展现了巨大的应用潜力。目前,国内已经开展了碲镉汞线性雪崩焦平面器件的研制工作,但缺乏评价其性能的方法及标准,同时对其的应用仍然处于探索阶段。首先分析了表征线性雪崩焦平面器件性能的关键参数,同时基于碲镉汞线性雪崩焦平面器件的特点,探讨了雪崩焦平面器件在主/被动红外成像、快速红外成像等领域的应用,最后对碲镉汞雪崩焦平面器件的未来发展进行了展望。     

碲镉汞雪崩光电二极管的发展

雪崩光电二极管(APD)工作在足够的反偏下,光生载流子到达耗尽区并诱发放大过程.碲镉汞(MCT)电子和重空穴有效质量之间的非对称性会产生不相等的电子电离系数和空穴电离系数,提供一个由单独一类载流子诱发的碰撞电离过程,从而形成具有包括接近无噪声增益在内的“理想”APD特征的电子雪崩光电二极管(EAPD).对于包括低光子数...     

短波碲镉汞电子雪崩二极管的模拟仿真

碲镉汞e-APD器件可用于低弱信号检测,碲镉汞材料工艺、器件工艺及器件结构设计对器件性能非常重要。本文采用silvaco软件对平面PIN结构的短波碲镉汞e-APD器件的暗电流、雪崩增益和量子效率进行了仿真分析。结果表明:1)高工作电压下,器件暗电流的主要成分是带间直接隧穿电流;2)工艺因素引入的接近禁带中心的陷阱能级决定器件在中等偏压下的暗电流特性;3)带间直接隧穿和电子碰撞电离主要发生在低掺杂的雪崩放大区;4)在固定偏压下,器件的暗电流和雪崩增益随着雪崩放大区宽度的上升而减少;5)在固定偏压下,器件的雪崩增益随吸收层厚度的增加而轻微增加,同时量子效率逐渐下降。为实现高性能的短波碲镉汞e-APD器件,需要合理设计器件结构和优化材料生长工艺及器件制造工艺。     

碲镉汞器件光敏元电容测试与分析

报道了液氮温度下对HgCdTe器件进行电容测试的方法。标定了仪器寄生电容以及杜瓦寄生电容,并利用该测试结果计算得到PN结区附近的载流子浓度和相应的深度等数据。对比了碲镉汞常规PN结器件与雪崩光电二极管(APD)器件的耗尽层宽度以及N区载流子浓度。     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first     

JOURNAL OF ELECTRONICS(CHINA)

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NOTICE OF CHANGING JOURNAL OF ELECTRONICS （CHINA） TO MICROSYSTEMS ＆ NANOENGINEERING

正Journal of Electronics(China)(JE)was founded in 1984,sponsored by the Institute of Electronics,Chinese Academy of Sciences.JE is one of the first English academic journals in China in the field of Electronics and Information technology.The journal was published quarterly since it was launched in 1984 to 2003,then it is published bimonthly till now.During