Design of an Antireflection Coating for High-efficiency Superconducting Nanowire Single-photon Detectors
- Authors
- Choi, J[Choi, Jiman]; Choi, G[Choi, Gahyun]; Lee, SK[Lee, Sun Kyung]; Park, K[Park, Kibog]; Song, W[Song, Woon]; Lee, DH[Lee, Dong-Hoon]; Chong, Y[Chong, Yonuk]
- Issue Date
- Aug-2021
- Publisher
- OPTICAL SOC KOREA
- Keywords
- Antireflection coating; Detection efficiency; Superconducting nanowire single photon detector
- Citation
- CURRENT OPTICS AND PHOTONICS, v.5, no.4, pp.375 - 383
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- CURRENT OPTICS AND PHOTONICS
- Volume
- 5
- Number
- 4
- Start Page
- 375
- End Page
- 383
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/91707
- DOI
- 10.3807/COPP.2021.5.4.375
- ISSN
- 2508-7266
- Abstract
- We present a simulation method to design antireflection coating (ARCs) for fiber-coupled superconducting nanowire single-photon detectors. Using a finite-element method, the absorptance of the nanowire is calculated for a defined unit-cell structure consisting of a fiber, ARC layer, nanowire absorber, distributed Bragg reflector (DBR) mirror, and air gap. We develop a method to evaluate the uncertainty in absorptance due to the uncontrollable parameter of air-gap distance. The validity of the simulation method is tested by comparison to an experimental realization for a case of single-layer ARC, which results in good agreement. We show finally a double-layer ARC design optimized for a system detection efficiency of higher than 95%, with a reduced uncertainty due to the air-gap distance.
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Collections - Graduate School > SKKU Advanced Institute of Nano Technology > 1. Journal Articles
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