Terahertz Direct Detection Characteristics of a Superconducting NbN Bolometer
Terahertz Direct Detection Characteristics of a Superconducting NbN Bolometer
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DOI：
10.1088/0256-307x/28/1/010702
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发表时间：
2011
影响因子：
3.5
通讯作者：
Ren Yuan;Miao Wei;Yao Qijun;Z. Wen;Shi Shengcai
中科院分区：
文献类型：
--
作者：
Ren Yuan;Miao Wei;Yao Qijun;Z. Wen;Shi Shengcai
报道了螺旋天线耦合NbN超导热电子测辐射热计(HEB)在4.2K温度下的太赫兹直接探测特性。从不同偏置电流下的电阻转变曲线测得的热导为3×10(-7)W/K。该器件在4.2K时的读出电路的极限噪声等效功率(NEP)为4.5×10(-12)W/Hz(1/2)，并配有一个在室温下工作的自制跨阻放大器。
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 x 10(-7) W/K. The device shows a read-out circuit limited noise equivalent power (NEP) of 4.5x10(-12) W/Hz(1/2) at 4.2K with a home-made transimpedance amplifier operating at room temperature.