Design of a micrometer-long superconducting nanowire perfect absorber for efficient high-speed single-photon detection
Abstract
Despite very efficient superconducting nanowire single-photon detectors (SNSPDs) reported recently, combining their other performance advantages such as high speed and ultralow timing jitter in a single device still remains challenging. In this work, we present a perfect absorber model and the corresponding detector design based on a micrometer-long NbN nanowire integrated with a 2D photonic crystal cavity of ultrasmall 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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 14, 2020
- Source ID
- 10.1364/prj.390945
Entities
People
- Chang-Ling Zou
- Hong X Tang
- Risheng Cheng
- Sihao Wang
Organizations
- Army Research Office
- Office of Emerging Frontiers and Multidisciplinary Activities