A niobium nitride superconducting hot electron bolometer direct terahertz detector working at 9 K
Abstract
Increasing the bath temperature of the hot electron bolometer (HEB) while ensuring sensitivity could expand the application field and reduce the system complexity and cost. This study proposed and prepared a suspended NbN/Nb5N6 HEB with doubled bath temperature and undegraded sensitivity compared to NbN HEB. Under the bath temperature of 9 K, the optical noise equivalent power of the system was still of the order of pW/Hz1/2. Moreover, the influence of thermal relaxation on the device sensitivity was simulated. The results would provide a pathway for improving the bath temperature and detector sensitivity through fine adjustments of the thermal boundaries.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (12)
Hongkai Shi
College of Physics, Nanjing University of Aeronautics & Astronautics 1 , No. 29 Jiangjun Rd., Nanjing 211106,
Tao Xu
Yijun Zhe
Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University 1 , Nanjing 210023,
Runfeng Su
Research Institute of Superconductor Electronics, School of Electronic Science and Engineering & National Key Laboratory of Microwave Photonics (Nanjing University), Nanjing University 1 , Nanjing 210023,
Jianfeng Li
State Key Laboratory of Elemento-Organic Chemistry
Han Bao
Xuecou Tu
Kebin Fan
Research Institute of Superconductor Electronics (RISE) and Key Laboratory of Optoelectronic Devices and Systems with Extreme Performances of MOE, School of Electronic Science and Engineering, Nanjing University 1 , Nanjing 210023,
Xiaoqing Jia
Lin Kang
Jian Chen
Peiheng Wu