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Implementation method of superconducting nanowire single-pixel spectrometer with programmable responsivity

A technology of superconducting nanowires and a realization method, which is applied in the field of miniature single-pixel spectrometers, and can solve problems such as bulky size, no spectral resolution capability, and inability to meet compact applications.

Active Publication Date: 2021-07-30
NANJING UNIV
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Problems solved by technology

Although the superconducting nanowire single-photon detector has a wide spectral response range, it has no spectral resolution capability. To make a spectrometer, the current practice is to place additional optical elements in front of the detector, which leads to its volume. Bulky, not enough for some compact applications

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  • Implementation method of superconducting nanowire single-pixel spectrometer with programmable responsivity
  • Implementation method of superconducting nanowire single-pixel spectrometer with programmable responsivity
  • Implementation method of superconducting nanowire single-pixel spectrometer with programmable responsivity

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Embodiment Construction

[0020] The present invention will be further described in detail below with reference to the accompanying drawings.

[0021] The superconducting noodle single photon detector is a photon count type detector, and the measured light intensity can be characterized by the count rate of the detector. It consists of a superconducting film nanowire offset by a current, such as figure 2 Down in the section A section. When a photon is absorbed by nanowires, a electrical pulse is probably generated. This probability and the size of the bias current are related to the energy of the photon. When the bias current is increasing, the cutoff wavelength of the detector responds toward longer wavelengths, such as figure 1 The in section B is shown. That is, when biased under different current, the spectral response rate of the detector is linear independent, ie the present invention has discovered the superconducting nanowire single photon detector having a spectral response rate offset under diffe...

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Abstract

The invention discloses a method for implementing a superconducting nanowire single-pixel spectrometer with a programmable responsivity, which measures the intrinsic wavelength-current response matrix of a superconducting nanowire single-photon detector, measures the optical count rate and calculation under different currents Reconstruction; the method includes: the first step: calibrate the intrinsic wavelength-current response matrix Φ(i, λ) of the superconducting nanowire single photon detector; the second step: under the irradiation of incident light, measure different currents The light count rate y(i) under ; the third step: calculate and reconstruct the incident spectrum x(λ). The implementation method of the superconducting nanowire single-pixel spectrometer with programmable responsivity of the present invention does not require additional optical modulation units and detector arrays, and only one detection unit can realize spectrum measurement under extremely weak light.

Description

Technical field [0001] The present invention relates to an integrated micro single pixel spectrometer, and more particularly to a superconducting nanolear single pixel spectrometer with a programmable response rate, suitable for a compact spectral detection of space under extremely weak light. Background technique [0002] Spectrum detection under extremely weak light requires a single photon sensitivity detector. The superconducting noodle single photon detector has many excellent performance: wide spectral response range, low dark count, high dynamic range, and easy to implement on-chip photon integration. Although the superconducting noodle single photon detector has a wide spectral response range, it does not have a spectral resolution ability. It is necessary to form a spectrometer. The current practice is in front of the detector, which leads to its volume. Great, unable to meet some compact applications. Inventive content [0003] For the above-described prior art, it is ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/12G01J3/28G01J1/44
CPCG01J1/44G01J3/12G01J3/28G01J2001/442
Inventor 赵清源孔令东
Owner NANJING UNIV
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