High-quality multi-wavelength quantum light sources on silicon nitride micro-ring chip

Multi-wavelength quantum light sources, especially at telecom band, are extremely desired in quantum information technology. Despite recent impressive advances, such a quantum light source with high quality remains challenging. Here we demonstrate a multi-wavelength quantum light source using a sili...

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Bibliographic Details
Published in:arXiv.org 2022-09
Main Authors: Yun-Ru Fan, Lyu, Chen, Chen-Zhi, Yuan, Guang-Wei Deng, Zhi-Yuan, Zhou, Geng, Yong, Hai-Zhi Song, Wang, You, Yan-Feng, Zhang, Rui-Bo, Jin, Zhou, Heng, Li-Xing, You, Guo, Guang-Can, Zhou, Qiang
Format: Article
Language:English
Subjects:
Light sources
Optimization
Photons
Quantum phenomena
Room temperature
Silicon nitride
Telecommunications
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Summary:Multi-wavelength quantum light sources, especially at telecom band, are extremely desired in quantum information technology. Despite recent impressive advances, such a quantum light source with high quality remains challenging. Here we demonstrate a multi-wavelength quantum light source using a silicon nitride micro-ring with a free spectral range of 200 GHz. The generation of eight pairs of correlated photons is ensured in a wavelength range of 25.6 nm. With device optimization and noise-rejecting filters, our source enables the generation of heralded single-photons - at a rate of 62 kHz with \(g^{(2)}_{h}(0)=0.014\pm0.001\), and the generation of energy-time entangled photons - with a visibility of \(99.39\pm 0.45\%\) in the Franson interferometer. These results, at room temperature and telecom wavelength, in a CMOS compatible platform, represent an important step towards integrated quantum light devices for the quantum networks.
ISSN:2331-8422