论文标题
亚仪表动感检测器对85 GHz辐射敏感
Subgap kinetic inductance detector sensitive to 85-GHz radiation
论文作者
论文摘要
我们已经制造了由80-90 GHz频带敏感的颗粒铝（$ t_c \ sim $ 2〜K）制造的一系列子量管动力学探测器（Skids）（Skids），并在300〜MK下运行。我们的噪声当量功率为$ 1.3 \ times10^{ - 16} $ 〜w/hz $^{0.5} $，$ 2.6 \ times10^{ - 17} $ 〜w/hz $^{0.5} $充其量是每位pixel的50〜 fW的启动功率。即使滑板的电路设计与动力探测器（KIDS）相同，但Skids操作原理还是基于它们对亚gap激发的敏感性。该检测方案是有利的，因为它避免了必须按比例降低工作温度到最低可检测的频率。此处介绍的滑雪者本质上选择了80-90 GHz频带，远低于膜的超导光谱间隙，约为180 GHz。
We have fabricated an array of subgap kinetic inductance detectors (SKIDs) made of granular aluminum ($T_c\sim$2~K) sensitive in the 80-90 GHz frequency band and operating at 300~mK. We measure a noise equivalent power of $1.3\times10^{-16}$~W/Hz$^{0.5}$ on average and $2.6\times10^{-17}$~W/Hz$^{0.5}$ at best, for an illuminating power of 50~fW per pixel. Even though the circuit design of SKIDs is identical to that of the kinetic inductance detectors (KIDs), the SKIDs operating principle is based on their sensitivity to subgap excitations. This detection scheme is advantageous because it avoids having to lower the operating temperature proportionally to the lowest detectable frequency. The SKIDs presented here are intrinsically selecting the 80-90 GHz frequency band, well below the superconducting spectral gap of the film, at approximately 180 GHz.
