Superconducting nanowire single-photon detector in an optical cavity for front-side illumination
Superconducting nanowire single-photon detector in an optical cavity for front-side illumination
复制标题
DOI：
10.1063/1.3263715
复制
发表时间：
2009-11
影响因子：
4
通讯作者：
B. Baek;J. Stern;S. Nam
中科院分区：
文献类型：
--
作者：
B. Baek;J. Stern;S. Nam
我们集成了超导纳米线单光子探测器(SNSPD)和用于正面照明的光腔设计。我们的光腔设计提高了光到纳米线探测器的耦合效率，并为多通道探测器系统实现了直接的邻近光纤耦合。使用共聚焦光学扫描技术，我们在1550 nm和3K下测量到了比典型的裸纳米线器件20%显著提高了73%的光吸收。我们在硅片上制作这些器件的方法和局域光吸收测量是开发下一代SNSPD技术的重要步骤。
We have integrated superconducting nanowire single-photon detectors (SNSPDs) with an optical cavity design for front-side illumination. Our optical cavity design increases the coupling efficiency of light to the nanowire detector and enables straightforward proximity fiber-coupling for a multichannel detector system. Using a confocal optical scanning technique, we measured a significantly enhanced optical absorptance of 73% in comparison with 20% in a typical bare nanowire device at 1550 nm and 3 K. Our method of fabrication of these devices on a silicon wafer and the local optical absorptance measurement are important steps toward developing next-generation SNSPD technology.