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Quantum Light Generation Based on GaN Microring toward Fully On-Chip Source.

Hong Zeng1,2, Zhao-Qin He3, Yun-Ru Fan1,2

  • 1Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China.

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|April 13, 2024
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Summary
This summary is machine-generated.

Gallium nitride (GaN) microrings generate entangled photon pairs for quantum information processing. This breakthrough enables on-chip quantum light sources for scalable quantum circuits.

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Area of Science:

  • Quantum optics
  • Materials science
  • Integrated photonics

Background:

  • Integrated quantum light sources are crucial for scalable quantum information processing.
  • Developing new material platforms for on-chip quantum functionalities remains a key challenge.

Purpose of the Study:

  • To demonstrate a gallium nitride (GaN) microring-based quantum light source for on-chip integration.
  • To explore the potential of GaN for monolithic quantum photonic circuits.

Main Methods:

  • Fabrication of GaN microrings with a free spectral range of 330 GHz and a broad near-zero anomalous dispersion region.
  • Generation of energy-time entangled photon pairs.
  • Characterization of photon pair entanglement via two-photon interference visibility.
  • Configuration for heralded single photon generation and measurement of g_{H}^{(2)}(0).

Main Results:

  • Demonstrated GaN microring quantum light generation in the telecom C-band.
  • Achieved a raw two-photon interference visibility of 95.5±6.5% for entangled photon pairs.
  • Generated heralded single photons with g_{H}^{(2)}(0) = 0.045±0.001.

Conclusions:

  • GaN microrings offer a promising platform for integrated quantum light sources.
  • The results pave the way for chip-scale quantum photonic circuits.
  • This work advances the development of monolithic quantum technologies.