一种用于探测太赫兹信号的测辐射热仪  

Bolometer for terahertz signal detection

作　　者：鲁学会 

机构地区：[1]上海卫星工程研究所,上海200240

出　　处：《激光与红外》2013年第10期1149-1152,共4页Laser & Infrared

摘　　要：基于Nb5N6薄膜在室温下具有高达-0.7%K-1的电阻温度系数,用Nb5N6薄膜结合平面蝴蝶结天线制备了一种可在室温下进行100 GHz信号探测的测辐射热仪。该器件在偏置电流为0.4 mA的条件下,达到的最佳电压响应为-400 V/W,调制频率为200 Hz时等效噪声功率达到1.5×10-11W/Hz,调制频率10 kHz以上时等效噪声功率优于9.5×10-12W/Hz。Based on thin NbsN6 film,whose temperature coefficient of resistance （TCR） is as high as-0. 7% K-1 at room temperatures, a bolometer integrated with a planar bow-tie antenna has been designed and fabricated for detecting signals at 100GHz without cooling. The best attainable electrical responsivity of the bolometer is about -400 V/W at bias current of 0. 4 mA. The electrical noise equivalent powers （NEP） is 1.5×10-11 w/（√Hz） for a modulation fre-quency of 200 Hz and 9.5×10-12W/（√Hz） f or the modulation frequency above lOkHz.

关 键 词：测辐射热计 太赫兹探测 Nb5N6薄膜 

分 类 号：O441[理学—电磁学]