10.6[mu]m single-photon detector based on frequency up-conversion and performance test experimental device

Abstract

The invention relates to a 10.6[mu]m single-photon detector based on frequency up-conversion and a performance test experimental device based on the single-photon detector. In the 10.6[mu]m single-photon detector, a ridge-shaped waveguide structure is designed based on an OP-GaAs thin film and used for converting long-wave infrared single photons to a short-wave infrared band in a sum frequency mode, then a mature short-wave infrared single-photon detector is adopted for detection, so that single-photon detection is achieved on the long-wave infrared band, and all-weather free space quantum key distribution, infrared single-photon imaging and single-photon laser radar become possible. Moreover, with the help of the single-photon detector, single-photon detection in a room-temperature environment can be realized, and low-temperature limitation can be avoided, so that the structure of the single-photon detector can be greatly simplified, the requirement of the single-photon detector on a use environment is reduced, the use and maintenance costs are reduced, and the application range of the single-photon detector is expanded.

Description

technical field [0001] The invention relates to the field of quantum information science, in particular to a 10.6 μm single-photon detector based on frequency up-conversion and a performance testing experimental device for the single-photon detector. Background technique [0002] There are three atmospheric windows in the infrared band: 1-3μm, 3-5μm and 8-12μm, which belong to short-wave infrared, medium-wave infrared and long-wave infrared respectively. Water molecules in the atmosphere are the main absorbers of infrared radiation. Compared with medium-wave and short-wave infrared, long-wave infrared windows can effectively resist the absorption of water molecules, reduce the impact of weather, and have better transmission characteristics. Especially in the 10.6μm band, the scattering and absorption of various particles in the atmosphere are weak, so it is expected to be used in important fields such as all-weather free space quantum key distribution, all-weather infrared s...

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problem that the existing technology cannot realize single photon detection in the long-wave infrared band, the present invention proposes a frequency up-conversion scheme based on orientation-patterned Gallium Arsenide (OP-GaAs) waveguide for the first time, which will The single-photon sum of long-wave infrared is frequency-converted to short-wave infrared, and then detected by a mature short-wave infrared single-photon detector, thereby realizing single-photon detection on long-wave infrared, so that all-weather free-space quantum key distribution, infrared single-photon Photon imaging and single-photon lidar possible

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