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Park, Kibog
Emergent Materials & Devices Lab
Research Interests
  • Semiconductor, Metal Oxide Thin Film, Graphene, Non-Volatile Memory, Quantum Transport, Quantum Computing Device

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Design of an Antireflection Coating for High-efficiency Superconducting Nanowire Single-photon Detectors

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Title
Design of an Antireflection Coating for High-efficiency Superconducting Nanowire Single-photon Detectors
Author
Choi, JimanChoi, GahyunLee, Sun KyungPark, KibogSong, WoonLee, Dong-HoonChong, Yonuk
Issue Date
2021-08
Publisher
OPTICAL SOC KOREA
Citation
CURRENT OPTICS AND PHOTONICS, v.5, no.4, pp.375 - 383
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.
URI
https://scholarworks.unist.ac.kr/handle/201301/54000
URL
http://koreascience.or.kr/article/JAKO202124553096023.page
DOI
10.3807/COPP.2021.5.4.375
ISSN
2508-7266
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PHY_Journal Papers
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