Superconductive nanowire single-photon detector capable of distinguishing photon number and preparation method thereof

A single-photon detector and superconducting nanowire technology, applied in the field of single-photon detection, can solve the problems of huge readout circuit, limited quantum efficiency and the highest number of resolvable photons, and achieve high quantum efficiency, low dark count, high The effect of count rate
CN102353464BActive Publication Date: 2012-11-14TSINGHUA UNIV
1 Cites 2 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2012-11-14

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a superconductive nanowire single-photon detector capable of distinguishing photon number. The superconductive nanowire single-photon detector consists of N superconductive nanowires which are connected in series and corresponding N bypass resistors, wherein each bypass resistor is arranged between every two adjacent superconductive nanowires; the superconductive nanowires are made from superconductive materials such as niobium nitride or titanium niobium nitride and the like; and the bypass resistors are made from metal films such as gold or titanium and the like. The invention further provides a method for preparing the superconductive nanowire single-photon detector. The prepared superconductive nanowire single-proton detector has high quantum efficiency, high counting efficiency, low dark count and capability of distinguishing photon number, and is not influenced by leakage current.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the field of single-photon detection, is suitable for single-photon detection that needs to realize photon number resolution in visible light and infrared bands, and relates to a superconducting nanowire single-photon detector capable of resolving photon numbers and a preparation method. Background technique

[0002] In recent years, single-photon detection technology has been widely demanded and applied in advanced optical imaging, spectroscopy, high-energy physics, ultra-fast space satellite communication, radiation detection and quantum information. G.N.Gol'tsman et al., "Picosecond superconducting single-photon optical detector," Applied Physics Letter, vol.79, pp.705-707, 2001. Documented superconducting nanowire single-photon detector (SNSPD) since its Since its birth, it has attracted people's attention due to its excellent single-photon detection ability in the visible and infrared bands, ultra-high count rate, low dark...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More