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Superconducting photon detector

  • US 10,620,044 B2
  • Filed: 06/24/2019
  • Issued: 04/14/2020
  • Est. Priority Date: 02/06/2018
  • Status: Active Grant
First Claim
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1. A photon detector, comprising:

  • a substrate;

    a first waveguide configured to guide photons from a photon source, the first waveguide having a first linear coupling region and respective portions on each side of the first linear coupling region, wherein the first linear coupling region has a first length;

    a second waveguide that is distinct and separate from the first waveguide, the second waveguide having a second linear coupling region that is optically-coupled to the first linear coupling region of the first waveguide, wherein the first linear coupling region of the first waveguide is a first distance from the second waveguide, and the respective portions of the first waveguide on each side of the first linear coupling region are further from the second waveguide than the first linear coupling region; and

    a superconducting detector component configured to detect photons within the second waveguide, the superconducting detector component having a linear detector portion positioned adjacent to, and optically-coupled with, the second linear coupling region, wherein the linear detector portion has a second length that is longer than the first length, and the linear detecting portion spans the second linear coupling region;

    wherein the first waveguide and the second waveguide are integrated on the substrate.

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