太赫兹光子传感动力学电感探测器中的非平衡超导性
Non-Equilibrium Superconductivity in Kinetic Inductance Detectors for THz Photon Sensing
摘要：
低温动力学电感探测器（KID）是一种具有量子灵敏度的、可阵列化的传感器，可用于天体物理和其他精密测量。读出使用低频探测信号，其能量量子远低于超导体中成对断裂的阈值。我们已经计算了详细的非平衡准粒子和声子的能量谱所产生的探测信号的KID操作时远低于其超导转变温度Tc的框架内的耦合动力学方程描述的张和Scalapino。[1]在研究的最低浴温Tb/Tc = 0.1的准粒子分布可以驱动远离平衡。除了低频探测信号，我们还结合了一个高频（~ 1 THz）源信号，远高于超导体的成对断裂阈值。讨论了源信号检测效率的计算
英文摘要：
Low temperature Kinetic Inductance Detectors (KIDs) are attractive candidates for producing quantumsensitive, arrayable sensors for astrophysical and other precision measurement applications. The readout uses a low frequency probe signal with quanta of energy well-below the threshold for pair-breaking in the superconductor. We have calculated the detailed non-equilibrium quasiparticle and phonon energy spectra generated by the probe signal of the KID when operating well-below its superconducting transition temperature Tc within the framework of the coupled kinetic equations described by Chang and Scalapino.[1] At the lowest bath temperature studied Tb/Tc = 0.1 the quasiparticle distributions can be driven far from equilibrium. In addition to the low frequency probe signal we have incorporated a high frequency (~ 1 THz) source signal well-above the pair-breaking threshold of the superconductor. Calculations of source signal detection efficiency are discussed
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