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A wide-spectrum high-efficiency superconducting single-photon detector and its preparation method

A single-photon detector and high-efficiency technology, applied in the field of photoelectric detection, can solve the problems of narrow response range, high preparation difficulty, low detection efficiency, etc., achieve the effect of low fiber cost, high coupling efficiency, and broaden the application field

Active Publication Date: 2022-05-17
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Purpose of the invention: In order to solve the problems of low detection efficiency, narrow response range, high preparation difficulty, and low yield of existing superconducting nanowire single-photon detectors, the present invention proposes a wide-spectrum high-efficiency superconducting single-photon detector and its preparation method

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  • A wide-spectrum high-efficiency superconducting single-photon detector and its preparation method
  • A wide-spectrum high-efficiency superconducting single-photon detector and its preparation method
  • A wide-spectrum high-efficiency superconducting single-photon detector and its preparation method

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Embodiment 1

[0049] The wide-spectrum high-efficiency superconducting single-photon detector based on the fiber end face of this embodiment is prepared by the following steps:

[0050] Step 1: Punch holes in the glass plate clamp at the specified position according to the vertical direction (0°);

[0051] Step 2: Place the glass ferrule containing the optical fiber in the hollow of the glass plate clamp at 0° and glue it with special glue. Polish the entire glass clamp and glass ferrule along the horizontal plane to remove excess optical fiber and glass ferrule and the glass sleeve, so that the overall thickness is 500 microns, and a complete glass plate containing optical fibers is prepared by using the polishing liquid process;

[0052] Step 3: Use acetone and ethanol to clean the end face of the optical fiber with low-power ultrasound in order to remove impurities on the surface and ensure the high cleanliness of the end face, and dry it with nitrogen to obtain the cleaned end face of t...

Embodiment 2

[0057] The wide-spectrum high-efficiency superconducting single-photon detector based on the fiber end face of this embodiment is prepared by the following steps:

[0058] Step 1: Drill holes on the glass plate clamp at the specified position according to 43.64°;

[0059] Step 2: Place the glass ferrule containing the optical fiber in the hollow of the glass plate sleeve according to 43.64° and glue it with special glue. Polish the entire glass sleeve and glass ferrule along the horizontal plane to remove redundant optical fiber and glass ferrule and the glass sleeve, so that the overall thickness is 500 microns, and a complete glass plate containing optical fibers is prepared by using the polishing liquid process;

[0060] Step 3: Use acetone and ethanol to clean the end face of the optical fiber with low-power ultrasound in order to remove impurities on the surface and ensure the high cleanliness of the end face, and dry it with nitrogen to obtain the cleaned end face of the...

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Abstract

The invention discloses a wide-spectrum high-efficiency superconducting single-photon detector and a preparation method thereof, comprising a superconducting nanowire unit, an electrode, a glass ferrule, a glass plate sleeve clamp and an optical fiber, the optical fiber includes a core and a cladding; the optical fiber Embedded in the glass ferrule, the glass ferrule is embedded in the glass plate clamp at a certain angle, the end faces of the optical fiber, the glass ferrule and the glass plate clamp are all on the same horizontal plane; the superconducting nanowire unit is arranged on the top of the optical fiber The surface and cover the fiber core; the electrodes are arranged on the upper surface of the cladding and located on both sides of the superconducting nanowire unit; the invention can prepare a wide spectral response and high efficiency by designing the superconducting nanowire single photon detector on the end face of the fiber. The optical fiber end surface superconducting nanowire single photon detector has greatly improved the integration of superconducting single photon detectors, reduced the process manufacturing steps, and thus expanded the application field.

Description

technical field [0001] The invention belongs to the technical field of photoelectric detection, and in particular relates to a wide-spectrum high-efficiency superconducting single-photon detector and a preparation method thereof. Background technique [0002] With the vigorous development of quantum applications such as quantum communication and quantum computing, there is an urgent need for highly integrated superconducting single photon detectors. Superconducting Nanowire Single Photon Detector (SNSPD) is a new type of superconducting single photon detector, which has the characteristics of low dark count, fast detection speed, wide response spectrum and high efficiency. The core part of conventional superconducting nanowire single-photon detectors is prepared from extremely thin films of nanometer-scale superconducting materials, which are generally grown on silicon-based materials. In order to improve the photoresponse sensitivity of superconducting detectors, thin film...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J1/44G01J1/42G03F1/78G03F7/20
CPCG01J1/44G01J1/42G03F7/2004G03F1/78G01J2001/442G01J2001/4238Y02P70/50
Inventor 张蜡宝戴越谢臻达贾琨鹏费越汪小涵陈奇李飞燕何广龙涂学凑康琳吴培亨
Owner NANJING UNIV