Quantum Light Generation based on GaN Microring towards Fully On-chip Source

arxiv(2024)

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摘要
Integrated quantum light source is increasingly desirable in large-scale quantum information processing. Despite recent remarkable advances, new material platform is constantly being explored for the fully on-chip integration of quantum light generation, active and passive manipulation, and detection. Here, for the first time, we demonstrate a gallium nitride (GaN) microring based quantum light generation in the telecom C-band, which has potential towards the monolithic integration of quantum light source. In our demonstration, the GaN microring has a free spectral range of 330 GHz and a near-zero anomalous dispersion region of over 100 nm. The generation of energy-time entangled photon pair is demonstrated with a typical raw two-photon interference visibility of 95.5±6.5 generate heralded single photon with a typical heralded second-order auto-correlation g^(2)_H(0) of 0.045±0.001. Our results pave the way for developing chip-scale quantum photonic circuit.
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