Abstract

Noise equivalent temperature difference (NETD) is an important figure of merit for infrared detectors. Lower NETD means that the detector can realize smaller temperature resolution and longer range recognition. In this work, we investigate the device performance, especially the NETD characteristics of a long-wavelength infrared (LWIR) photodetector based on InAs/GaSb type-II superlattice (T2SL). To achieve mK-level temperature-sensitivity, the effect of detector's intrinsic and extrinsic factors on NETD performance has been discussed. Through a series of efforts, a NETD value of 7 mK was realized for a T2SL detector with a 100% cutoff wavelength of 11.4 μm at 77 K.

Investigation of a noise source and its impact on the photocurrent performance of long-wave-infrared InAs/GaSb type-II superlattice detectors

Chenxu Meng, Jinlan Li, Le Yu, Xiaomu Wang, Ping Han, Feng Yan, Zhicheng Xu, Jianxin Chen, and Xiaoli Ji
Opt. Express 28(10) 14753-14761 (2020)

Performance comparison between the InAs-based and GaSb-based type-II superlattice photodiodes for long wavelength infrared detection

Fangfang Wang, Jianxin Chen, Zhicheng Xu, Yi Zhou, and Li He
Opt. Express 25(3) 1629-1635 (2017)

2 MeV proton irradiation effect on the performance of InAs/GaSb type-II superlattice long-wave infrared detectors

Jing Zhou, Ruiting Hao, Xinchang Pan, Youwen Huang, Junbin Li, Yang Ren, Jincheng Kong, and Wuming Liu
Opt. Express 31(4) 6566-6576 (2023)

Gradual funnel photon trapping enhanced InAs/GaSb type-II superlattice infrared detector

Lei Xiao, Peng Zhu, Nong Li, Faran Chang, Haofei Shi, Xingzhan Wei, Wen Xiong, Tai Sun, and Guowei Wang
Opt. Express 30(21) 38009-38015 (2022)

Multiphoton absorption in type-II InAs/GaSb superlattice structure

Chengcheng Zhao, Jianliang Huang, Biying Nie, Jinchuan Zhang, Yanhua Zhang, and Wenquan Ma
Opt. Lett. 45(1) 165-168 (2020)