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Design and calculation of type-II superlattice resonant cavity-enhanced photodetector with high quantum efficiency and low dark current
Physica B: Condensed Matter ( IF 2.8 ) Pub Date : 2021-06-11 , DOI: 10.1016/j.physb.2021.413201
Ya-nan Du , Lei Wang , Yun Xu , Guofeng Song

The type-II superlattice (T2SLs) infrared detector with distributed Bragg reflector (DBR) on the basis of unipolar barrier structure is investigated. The traditional binary material InAs/GaSb is used in the device, and two kinds of unipolar barrier structures, nBn and pBp, are used to reduce the generation-recombination (GR) dark current of the device. 6 periods of AlAs0.09Sb0.91/GaSb is selected as the DBR mirror. The target wavelength of DBR mirror is 3.3 μm, which is used as methane detector. The supercell is 7 ML InAs/4 ML GaSb, which has a 50% cutoff wavelength of 4 μm. The quantum efficiency (QE) of the detector with DBR mirror can reach ~ 90% at the target wavelength of 3.3 μm, and is significantly higher than that of the device without DBR mirror. The peak detectivity of pBp RCE PD is about ~1 × 1013 Jones.



中文翻译:

高量子效率低暗电流II型超晶格谐振腔增强型光电探测器的设计与计算

研究了基于单极势垒结构的具有分布式布拉格反射器(DBR)的II型超晶格(T2SL)红外探测器。器件采用传统的二元材料InAs/GaSb,并采用nBn和pBp两种单极势垒结构来降低器件的生成-复合(GR)暗电流。6 周期 AlAs 0.09 Sb 0.91/GaSb 被选为 DBR 镜像。DBR 镜的目标波长为 3.3 μm,用作甲烷检测器。超级电池是 7 ML InAs/4 ML GaSb,其 50% 截止波长为 4 μm。带有 DBR 镜的探测器在 3.3 μm 目标波长处的量子效率 (QE) 可达到~90%,明显高于不带 DBR 镜的装置。pBp RCE PD 的峰值检测率约为 ~1 × 10 13 Jones。

更新日期:2021-06-28
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