Electrothermal model of kinetic inductance detectors
Electrothermal model of kinetic inductance detectors
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DOI：
10.1088/0953-2048/28/4/045012
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发表时间：
2014-11
影响因子：
3.6
通讯作者：
C. N. Thomas;S. Withington;D. Goldie
中科院分区：
文献类型：
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作者：
C. N. Thomas;S. Withington;D. Goldie
本文描述了动态电感探测器的一种非线性模型。谐振器准粒子系统的非平衡态的特征在于有效温度，其由于读出功率加热而高于浴的温度。通过平衡进入准粒子系统的能量流，可以计算稳态大信号、小信号和噪声行为。谐振曲线失真和滞后切换自然出现在框架内。结果表明，存在一个反馈过程，它影响行为的各个方面。它还表明，产生复合噪声可以解释在有效的热导，链接准粒子和声子系统的谐振器的热波动噪声。由于该方案是基于可编程的考虑，因此可以添加多个元件来模拟复杂设备的行为，例如膜上的谐振器，再次考虑读出功率加热。
An electrothermal model of kinetic inductance detectors is described. The non-equilibrium state of the resonator's quasiparticle system is characterized by an effective temperature, which because of readout-power heating is higher than that of the bath. By balancing the flow of energy into the quasiparticle system, it is possible to calculate the steady-state large-signal, small-signal and noise behaviour. Resonance-curve distortion and hysteretic switching appear naturally within the framework. It is shown that an electrothermal feedback process exists, which affects all aspects of behaviour. It is also shown that generation-recombination noise can be interpreted in terms of the thermal fluctuation noise in the effective thermal conductance that links the quasiparticle and phonon systems of the resonator. Because the scheme is based on electrothermal considerations, multiple elements can be added to simulate the behaviour of complex devices, such as resonators on membranes, again taking into account readout power heating.