Despite very efficient superconducting nanowire single-photon detectors (SNSPDs) reported recently, combining their other performance advantages such as high speed and ultra-low timing jitter in a single device still remains challenging. In this work, we present a perfect absorber model and corresponding detector design based on a micron-long NbN nanowire integrated with a 2D-photonic crystal cavity of ultra-small mode volume, which promises simultaneous achievement of near-unity absorption, gigahertz counting rates and broadband optical response with a 3 dB bandwidth of 71 nm. Compared to previous stand-alone meandered and waveguide-integrated SNSPDs, this perfect absorber design addresses the trade space in size, efficiency, speed and bandwidth for realizing large on-chip single-photon detector arrays.

中文翻译：

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用于高效高速单光子探测的微米长超导纳米线完美吸收体的设计

尽管最近报道了非常高效的超导纳米线单光子探测器 (SNSPD)，但在单个器件中结合其其他性能优势（例如高速和超低时序抖动）仍然具有挑战性。在这项工作中，我们提出了一个完美的吸收体模型和相应的探测器设计，基于微米长的 NbN 纳米线与超小模式体积的二维光子晶体腔集成，有望同时实现近统一吸收和千兆赫兹计数率和宽带光响应，3 dB 带宽为 71 nm。与之前的独立曲折和波导集成 SNSPD 相比，这种完美的吸收器设计解决了实现大型片上单光子探测器阵列在尺寸、效率、速度和带宽方面的权衡空间。