High-performance long-wavelength infrared photodetector based on M-structure InAs/GaSb type-II superlattices
Abstract
A high-performance long-wavelength infrared photodetector based on M-structure type-II superlattices was developed by optimizing the device structure and operating conditions. The detector exhibits a spectral response range of 3–12.5 μm, with a peak response of 4.73 A/W observed at 5.2 μm and 3.06 A/W at 8.1 μm. The quantum efficiency at 8 μm reaches approximately 50%. Notably, the response remains relatively constant under no bias or reverse bias. At an applied bias voltage of 10 mV, the detector's specific detectivity reached 3.62 × 1010 and 3.63 × 1010 cm·Hz0.5/W at 8 and 10 μm, respectively, demonstrating excellent detection capability in the long-wavelength range. Furthermore, D* remains above 1 × 1010 cm·Hz0.5/W for a bias voltage below 50 mV, demonstrating the detector's stability under low-bias conditions.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (17)
Hui Xie
Dongwei Jiang
State Key Laboratory of Optoelectronic Materials and Devices, Institute of Semiconductors, Chinese Academy of Sciences 1 , Beijing 100083,
Xiangyu Zhang
Ye Zhang
Yaqi Zhao
State key Laboratory of Optoelectronic Materials and Devices, Institute of Semiconductors, Chinese Academy of Sciences 1 , Beijing 100083,
Feng Gao
Chen Li
Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, USA.
Wen He
New Cornerstone Science Laboratory, MOE Key Laboratory for Analytical Science of Food Safety and Biology, College of Chemistry
Xiangqun Chen
School of Materials Science and Engineering, Harbin Institute of Technology 1 , Harbin 150001,
Hongyue Hao
State Key Laboratory of Optoelectronic Materials and Devices, Institute of Semiconductors, Chinese Academy of Sciences 1 , Beijing 100083,
Donghai Wu
Guowei Wang
Ordos Laboratory
Yingqiang Xu
State Key Laboratory of Optoelectronic Materials and Devices, Institute of Semiconductors, Chinese Academy of Sciences 1 , Beijing 100083,
Xiaoning Guan
School of Integrated Circuits, Beijing University of Posts and Telecommunications 4 , Beijing 100876,
Gang Liu
Dongbo Wang
Zhichuan Niu