论文标题
光学微波动感检测器中无膜的声子捕获和分辨率增强
Membrane-less phonon trapping and resolution enhancement in optical microwave kinetic inductance detectors
论文作者
论文摘要
微波动力电感探测器（MKIDS）对紫外线对近红外波长敏感的是超导微传感器，能够测量光子到达时间至微秒的精度并估算每个光子的能量。尽管系统噪声有了显着改善，但非膜MKID的分辨能力仍然固执地保持在1 $ $ m的左右。在这里，我们证明可以通过简单的双层设计将解决功率大致加倍，而无需将设备放在膜上，从而避免了制造复杂性的显着提高。基于声子传播的建模，我们发现大多数改进来自高能声子由于缺乏可用的声子状态而无法进入附加层。
Microwave Kinetic Inductance Detectors (MKIDs) sensitive to light in the ultraviolet to near-infrared wavelengths are superconducting micro-resonators that are capable of measuring photon arrival times to microsecond precision and estimating each photon's energy. The resolving power of non-membrane MKIDs has remained stubbornly around 10 at 1 $μ$m despite significant improvements in the system noise. Here we show that the resolving power can be roughly doubled with a simple bilayer design without needing to place the device on a membrane, avoiding a significant increase in fabrication complexity. Based on modeling of the phonon propagation, we find that the majority of the improvement comes from the inability of high energy phonons to enter the additional layer due to the lack of available phonon states.
