Terahertz Direct Detection Characteristics of a Superconducting NbN Bolometer  

作　　者：REN Yuan MIAO Wei YAO Qi-Jun ZHANG Wen SHI Sheng-Cai 

机构地区：[1]Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008 [2]Graduate School of the Chinese Academy of Sciences, Beijing 100049

出　　处：《Chinese Physics Letters》2011年第1期50-53,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 10803021, 10621303, 10933005 and 10778602, the National Basic Research Program of China under Grant No 2010CB327401, and CAS Key Lab for Radio Astronomy.

摘　　要：We report the terahertz direct detection characteristics of a spiral antenna coupled NbN superconducting hot- electron bolometer （HEB） at a bath temperature of 4.2K. Thermal conductance determined from resistance transition curves with different bias currents is found to be 3 × 10 7 W/K. The device shows a read-out circuit limited noise equivalent power （NEP） of 4.5 × 10-12 W/Hz/2 at 4.2 K with a home-made transimpedance amplifier operating at room temperature.We report the terahertz direct detection characteristics of a spiral antenna coupled NbN superconducting hot- electron bolometer （HEB） at a bath temperature of 4.2K. Thermal conductance determined from resistance transition curves with different bias currents is found to be 3 × 10 7 W/K. The device shows a read-out circuit limited noise equivalent power （NEP） of 4.5 × 10-12 W/Hz/2 at 4.2 K with a home-made transimpedance amplifier operating at room temperature.

关 键 词：SUPERCONDUCTIVITY Instrumentation and measurement 

分 类 号：TN215[电子电信—物理电子学] TP277[自动化与计算机技术—检测技术与自动化装置]