A photon counting reconstructive spectrometer combining metasurfaces and superconducting nanowire single-photon detectors

分类： 光学 >> 量子光学 提交时间： 2023-02-19

Jingyuan Zheng You Xiao Mingzhong Hu Yuchen Zhao Hao Li Lixing You Xue Feng Fang Liu Kaiyu Cui Yidong Huang Wei Zhang

摘要： Faint light spectroscopy has many important applications such as fluorescence spectroscopy, lidar and astronomical observations. However, long measurement time limit its application on real-time measurement. In this work, a photon counting reconstructive spectrometer combining metasurfaces and superconducting nanowire single photon detectors (SNSPDs) was proposed. A prototype device was fabricated on a silicon on isolator (SOI) substrate, and its performance was characterized. Experiment results show that this device support spectral reconstruction of mono-color lights with a resolution of 2 nm in the wavelength region of 1500 nm ~ 1600 nm. The detection efficiency of this device is 1.4% ~ 3.2% in this wavelength region. The measurement time required by this photon counting reconstructive spectrometer was also investigated experimentally, showing its potential to be applied in the scenarios requiring real-time measurement.

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