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Midwavelength interband cascade infrared photodetectors with superlattice absorbers and gain

机译:具有超晶格吸收器和增益的中波带间级联红外光电探测器

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摘要

We report on a comparison study of the electrical and optical properties of a set of device structures with different numbers of cascade stages, type-Ⅱ superlattice (T2SL) absorber thickness, and doping variations, as well as a noncurrent-matched interband cascade infrared photodetectors (ICIP) structure with equal absorbers. Multistage ICIPs were demonstrated to be capable of operating at high temperatures at zero-bias with superior carrier transport over comparable conventional one-stage detectors. Based on the temperature dependence and bias sensitivity of their responsivities with various absorber thicknesses, the diffusion length is estimated to be between 0.6 and 1.0 μm for T2SL materials at high temperatures (>250 K). A comparison of responsivities between current matched ICIPs with varied absorber thicknesses and noncurrent-matched ICIPs with equal absorbers shows that the current-matching among cascade stages is necessary to maximize responsivity. Additionally, electrical gain exceeding unity is demonstrated in these detectors in the reverse-illumination Configuration.
机译:我们报告了一组具有不同级联级数,Ⅱ型超晶格(T2SL)吸收体厚度和掺杂变化以及非电流匹配的带间级联红外光电探测器的器件结构的电学和光学性质的比较研究(ICIP)结构的吸收体相等。事实证明,与可比的传统一级检测器相比,多级ICIP能够在零偏置的高温下工作,并具有出色的载流子传输能力。基于温度依赖性及其在不同吸收层厚度下的响应偏差敏感性,对于高温(> 250 K)的T2SL材料,扩散长度估计在0.6至1.0μm之间。比较具有不同吸收层厚度的电流匹配ICIP和具有相等吸收层的非电流匹配ICIP之间的响应度,表明级联级之间的电流匹配对于最大化响应度是必要的。此外,在反向照明配置的这些检测器中证明了超过1的电增益。

著录项

  • 来源
    《Optical engineering》 |2018年第1期|011006.1-011006.10|共10页
  • 作者单位

    Universily of Oklahoma, School of Electrical and Computer Engineering, Norman, Oklahoma, United States,University of Oklahoma, Homer L. Dodge Department of Physics and Astronomy, Norman, Oklahoma, United States;

    Universily of Oklahoma, School of Electrical and Computer Engineering, Norman, Oklahoma, United States;

    Universily of Oklahoma, School of Electrical and Computer Engineering, Norman, Oklahoma, United States;

    Universily of Oklahoma, School of Electrical and Computer Engineering, Norman, Oklahoma, United States;

    Universily of Oklahoma, School of Electrical and Computer Engineering, Norman, Oklahoma, United States;

    University of Oklahoma, Homer L. Dodge Department of Physics and Astronomy, Norman, Oklahoma, United States;

    University of Oklahoma, Homer L. Dodge Department of Physics and Astronomy, Norman, Oklahoma, United States;

    West Virginia University, Department of Physics and Astronomy, Morgantown, West Virginia, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    interband cascade; midwavelength; infrared photodetector; type-ll superlattice; gain;

    机译:带间级联中波长红外光电探测器II型超晶格获得;

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