论文标题
用快速热电子验电仪运行高达31 GHz的THZ光学节奏检测
THz optical beat-note detection with a fast Hot Electron Bolometer operating up to 31 GHz
论文作者
论文摘要
我们研究了基于超导氮化物膜以THZ频率运行的热电子氢计（HEB）的性能。我们报告了检测器对具有不同THZ源进行的大光带宽的电压响应。我们表明，在7.5 K处完全包装的HEB的脉冲响应在2 GHz左右的3 dB截止值。值得注意的是，使用THZ量子级联激光频率梳子在杂作击实验中仍观察到检测能力以上30 GHz以上。此外，已经评估了HEB灵敏度，并以1 MHz测量了光学噪声等效功率NEP为0.8 PW/SQRT（Hz）。
We study the performance of an hot-electron bolometer (HEB) operating at THz frequencies based on superconducting niobium nitride films. We report on the voltage response of the detector over a large optical bandwidth carried out with different THz sources. We show that the impulse response of the fully packaged HEB at 7.5 K has a 3 dB cut-off around 2 GHz. Remarkably, detection capability is still observed above 30 GHz in an heterodyne beating experiment using a THz quantum cascade laser frequency comb. Additionally, the HEB sensitivity has been evaluated and an optical noise equivalent power NEP of 0.8 pW/sqrt(Hz) has been measured at 1 MHz.
