抑制间隙毫米波动能电感探测器使用直流偏置电流
Suppressed-gap millimetre wave kinetic inductance detectors using DC-bias current
AI总结：
本文研究了使用直流偏置铝共振腔作为低频动能电感探测器在50-120GHz频率范围内的适用性，通过Usadel方程分析发现直流偏置共振腔具有显著抑制的超导态密度间隙，使其适合低频动能电感探测器。
摘要：
在本研究中，我们评估了使用直流偏置的铝共振腔作为低频动能电感探测器在50-120GHz频率范围内的适用性。我们的超流体偏置共振腔分析程序基于Usadel方程，输出包括态密度、复电导率、传输线特性以及准粒子寿命。我们的分析结果证实了先前实验观察到的共振频率可调性和高品质因子的保持。关键的是，我们的分析表明，直流偏置共振腔显示出显著抑制的超导态密度间隙。因此，这些共振腔具有较低的频率检测阈值，并且是低频动能电感探测器的合适材料。
英文摘要：
In this study, we evaluate the suitability of using DC-biased aluminium resonators as low-frequency kinetic inductance detectors operating in the frequency range of 50 - 120 GHz. Our analysis routine for supercurrent-biased resonators is based on the Usadel equations and gives outputs including density of states, complex conductivities, transmission line properties, and quasiparticle lifetimes. Results from our analysis confirm previous experimental observations on resonant frequency tuneability and retention of high quality factor. Crucially, our analysis suggests that DC-biased resonators demonstrate significantly suppressed superconducting density of states gap. Consequently these resonators have lower frequency detection threshold and are suitable materials for low-frequency kinetic inductance detectors.
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