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High detection efficiency and rate superconducting nanowire single-photon detector with a composite optical structure

机译:具有复合光学结构的高检测效率和速率的超导纳米线单光子探测器

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摘要

Superconducting nanowire single-photon detectors (SNSPDs) with a composite optical structure composed of phase-grating and optical cavity structures are designed to enhance system detection efficiency and count rates. Numerical simulation by finite-difference time-domain method shows that the photon absorption capacity of SNSPDs with a composite optical structure can be enhanced significantly by adjusting the parameters of the phase-grating and optical cavity structures. The absorption capacity of the superconducting nanowires reached 69.8% at the wavelength of 850 nm with 0.3 filling factor. When the filling factor was reduced to only 0.08, the absorption capacity is still 48.52%. It greatly decreased the kinetic inductance of SNSPDs, and improved the count rates.
机译:具有由相位光栅和光学腔结构组成的复合光学结构的超导纳米线单光子探测器(SNSPD)旨在提高系统探测效率和计数率。时域有限差分法的数值模拟表明,通过调整相位光栅和光腔结构的参数,可以显着提高具有复合光学结构的SNSPDs的光子吸收能力。超导纳米线在波长为850 nm时具有0.3的填充因子,吸收能力达到69.8%。当填充因子降低至仅0.08时,吸收容量仍为48.52%。它大大降低了SNSPD的动电感,并提高了计数率。

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  • 来源
  • 会议地点 San Francisco CA(US)
  • 作者单位

    Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China;

    Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China;

    Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China;

    Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China;

    Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China;

    Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China;

    Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China;

    Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Superconducting nanowire single-photon detectors; SNSPD; composite optical structure; phase-grating; optical cavity;

    机译:超导纳米线单光子探测器; SNSPD;复合光学结构相位光栅光学腔;

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