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Broadband on-chip single-photon spectrometer.

Risheng Cheng1, Chang-Ling Zou1,2, Xiang Guo1

  • 1Department of Electrical Engineering, Yale University, New Haven, CT, 06511, USA.

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|September 12, 2019
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Summary
This summary is machine-generated.

This study introduces the first chip-scale single-photon spectrometer, capable of analyzing broadband light from 600nm to 2000nm. This innovation enables detailed spectral analysis of single photons for advanced applications.

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Area of Science:

  • Photonics
  • Spectroscopy
  • Quantum Optics

Background:

  • Single-photon counters lack spectral information.
  • Existing single-photon spectrometers are bulky or have limited channels.
  • Broadband spectral analysis of single photons is crucial for astronomy and quantum communications.

Purpose of the Study:

  • To develop a compact, broadband chip-scale single-photon spectrometer.
  • To overcome limitations of current single-photon spectral analysis technologies.
  • To enable high-resolution spectral detection across visible and infrared wavelengths.

Main Methods:

  • Integration of a chip-scale echelle grating for dispersion.
  • Utilizing an ultraslow-velocity superconducting nanowire single-photon detector.
  • Mapping dispersed photons with high spatial resolution on-chip.

Main Results:

  • Demonstration of the first broadband chip-scale single-photon spectrometer.
  • Operation across visible and infrared bands (600 nm–2000 nm).
  • Achieved over 200 equivalent wavelength detection channels with high spectral resolution.

Conclusions:

  • The developed spectrometer offers a small footprint and high robustness.
  • Enables parallel detection of broadband single photons with high spectral resolution.
  • Presents a scalable platform for future advancements in photonics and quantum technologies.