Wide-spectrum micro-nano fiber-coupled superconducting nanowire single-photon detector and preparation method thereof

Abstract

The invention provides a wide-spectrum micro-nano fiber-coupled superconducting nanowire single-photon detector and a preparation method thereof, comprising: a substrate; superconducting nanowires located on the surface of the substrate; superconducting nanowires comprising several parallel spaced rows The straight line part of the cloth and the connecting part located between adjacent straight line parts to connect each straight line end to end in a zigzag shape; the length of the straight line part is between 100 μm and 200 μm; the micro-nano optical fiber is located on the substrate, and the horizontal across the superconducting nanowire; the optical glue is located on the substrate and is cured and coated on the periphery of the superconducting nanowire and the micro-nano fiber; the optical glue has a preset refractive index range to prevent incident light in the micro-nano fiber Leakage to optical glue and substrate. The wide-spectrum micro-nano fiber-coupled superconducting nanowire single-photon detector of the present invention can achieve a high light absorption rate for light with a wide range of wavelengths from visible light to near-infrared light, and has a wide detection wavelength range, high detection efficiency and structural Simple and other advantages.

Description

technical field [0001] The invention belongs to the technical field of photoelectric detection, and relates to a superconducting nanowire single-photon detector, in particular to a wide-spectrum micro-nano fiber-coupled superconducting nanowire single-photon detector and a preparation method thereof. Background technique [0002] Superconducting nanowire single photon detectors (SNSPDs) are widely used in quantum communication, time-of-flight ranging and imaging, and life medicine because of their excellent performance such as high detection efficiency, low time jitter, low dark count, and high count rate. , space communications and other fields. It has become a mainstream single-photon detector in recent years. [0003] Broad-spectrum performance is of great significance for SNSPD applications, such as atmospheric detection, bioluminescent detection, optical microscopy, and single-photon imaging. The energy of a single photon (~1eV) is much larger than the superconducting...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the present invention proposes a wide-spectrum micro-nano fiber-coupled superconducting nanowire single-photon detector and its preparation method, which are simple, easy to implement, good in stability and strong in portability. The detectors in the prior art have problems such as small detection wavelength range, low detection efficiency and complicated preparation process.

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