高速、低噪声超导HEB太赫兹检测系统  

HIGH SPEED,LOW NOISE SUPERCONDUCTING HEB TERAHERTZ DETECTING SYSTEM

作　　者：张鹤[1] 陈健[1] 姜寿禄[1] 康琳[1] 许伟伟[1] 金飚兵[1] 吴培亨[1] 

机构地区：[1]南京大学超导电子学研究所,江苏南京210093

出　　处：《低温物理学报》2014年第6期445-449,共5页Low Temperature Physical Letters

基　　金：国家重点基础研究发展计划(批准号:2011CBA00107;2014CB339800);国家自然科学基金(批准号:11173015)资助的课题~~

摘　　要：本文介绍了一款高速、低噪声超导热电子测辐射热计(hot electron bolometer,HEB)的太赫兹检测系统,实验结果显示其有效提高了中频带宽(7.4GHz),减小了噪声温度(@0.65THz,系统在最佳偏置点的双边带(DSB)噪声温度为1185K).同时,用此款超导HEB太赫兹检测系统验证了改进后的傅里叶变换光谱仪(FTS)系统的稳定性及可靠性.This paper implements a weak signal detecting system in the terahertz（THz）regime with high speed and low noise,based on the superconducting hot electron bolometer（HEB）mixers.The experiment results show that the intermediate frequency（IF）bandwidth of this system is effectively enhanced（7.4GHz）,and the corresponding noise temperature is substantially decreased（at 0.65 THz,the double sideband（DSB）noise temperature is1185 Kat its optimum working point）.Moreover,this superconducting HEB terahertz detecting system is also used to confirm the stability and reliability of an improved Fourier transform spectrometer（FTS）.

关 键 词：超导HEB太赫兹检测系统 高速 低噪声 

分 类 号：TN219[电子电信—物理电子学]