1.State Key Laboratory of Infrared Physics， Shanghai Institute of Technical Physics， Chinese Academy of Sciences， Shanghai 200083， China;2.University of Chinese Academy of Sciences， Beijing 100049， China;3.Hangzhou Institute for Advanced Study， University of Chinese Academy of Sciences， Hangzhou 310024， China
Supported by National Natural Science Foundation of China （11933006）， and the Frontier Science Research Project （Key Programs） of the Chinese Academy of Sciences （QYZDJ-SSW-SLH018）
Blocked impurity band （BIB） detectors are the state-of-the-art choice for far infrared astronomical observation. Ge：B BIB far infrared detector has been successfully developed using near-surface processing techniques. The spectral response covers a wide range from 50 cm-1 to 400 cm-1. At a temperature of 3.5 K and a working voltage of 30 mV， the detector exhibits a highly competitive responsivity of 21.46 A?W-1 and a highly competitive detectivity of 4.34×1014 cm?Hz1/2?W-1 at the peak response of 84.9 cm-1. The influence of the interfacial barriers on the spectral response is investigated. A new excitation model that the carriers in the contact regions can be excited over the interfacial barriers is proposed. Moreover， a new method to enhance the relative response intensity of BIB detectors in the low wavenumber region is found.
PAN Chang-Yi, MOU Hao, YAO Xiao-Mei, HU Tao, WANG Yu, WANG Chao, DENG Hui-Yong, DAI Ning. High performance Ge:B blocked impurity band detector developed using near-surface processing techniques[J]. Journal of Infrared and Millimeter Waves,2022,41(2):389~394Copy