A time-amplitude multiplexed superconducting single-photon imaging device

An imaging device and single-photon technology, which is applied in photometry, instruments, and scientific instruments using electric radiation detectors, can solve the problems of SNSPD array readout difficulties, reduce readout complexity, and achieve high pixel readout efficiency and the effect of scalability

Active Publication Date: 2022-07-12
NANJING UNIV
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Problems solved by technology

[0003] However, limited by the low temperature environment, it is difficult to read out large-scale SNSPD arrays
Existing readout structures typically use dimensionality reduction (row-column readout), encoding, and feature multiplexing (time, frequency) methods alone, and there are challenges in further reducing readout complexity and increasing pixel scale.

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  • A time-amplitude multiplexed superconducting single-photon imaging device
  • A time-amplitude multiplexed superconducting single-photon imaging device
  • A time-amplitude multiplexed superconducting single-photon imaging device

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Embodiment Construction

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0019] This embodiment provides a time-amplitude multiplexed superconducting single-photon imaging device, in order to further reduce the readout complexity and increase the pixel scale.

[0020] The time-amplitude multiplexed superconducting single-photon imaging device is as Figure 1-2 shown. The core unit of the device is a superconducting nanowire avalanche photodetector, a series of superconducting nanowire avalanche photodetectors are combined in series to form a pixel, and M types of pixels are connected in series, repeating N cycles. The device structure is designed as a coplanar waveguide, and each pixel can provide sufficient time delay; the length of the superconducting nanowire avalanche photodetector in different pixels is different, and the amplitude of the rising edge of the response pulse is different. Thus, N discrete features are read out...

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Abstract

The invention discloses a time-amplitude multiplexed superconducting single-photon imaging device, comprising N pixel combination units that repeat periodically, the pixel combination units are formed by connecting M different pixels in series, and a single pixel is composed of Several superconducting nanowire avalanche photodetectors are connected in series. The superconducting nanowire avalanche photodetectors in different types of pixels have different lengths and different amplitudes of the rising edge of the response pulse. The superconducting single-photon imaging device is a coplanar waveguide structure, and each pixel can provide a predetermined pulse transmission delay. Using the time-amplitude multiplexed superconducting single-photon imaging device of the present invention, N discrete features are read out in the time dimension, and M discrete features are read out in the amplitude dimension. Finally, only two readout ports are used. , M×N spatial positions can be read out.

Description

technical field [0001] The invention relates to a superconducting single-photon imaging device, in particular to a superconducting single-photon imaging device based on a combined time and amplitude multiplexing mechanism, which is suitable for spatially resolved detection under extremely weak light. Background technique [0002] The temporal and spatial detection of single photons has driven advances in single-photon imaging, fluorescence lifetime analysis, extreme optical communication, and quantum information processing. Imaging in very low light requires a detector with single-photon sensitivity. Compared with semiconductor-counting avalanche diode single-photon detectors, superconducting nanowire single-photon detectors (SNSPDs) have performance advantages in efficiency, time jitter, and spectral response bandwidth. . [0003] However, limited by the low temperature environment, large-scale SNSPD array readout is difficult. Existing readout structures typically utiliz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J1/42G01J11/00
CPCG01J1/42G01J11/00G01J2001/4238
Inventor 赵清源孔令东
Owner NANJING UNIV
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