High-quality multi-wavelength quantum light sources on silicon nitride micro-ring chip
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by
Yun-Ru Fan, Chen Lyu, Chen-Zhi Yuan, Guang-Wei Deng, Zhi-Yuan Zhou, Yong Geng, Hai-Zhi Song, You Wang, Yan-Feng Zhang, Rui-Bo Jin, Heng Zhou, Li-Xing You (+2 others)
2022
Abstract
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±0.001, and the generation of energy-time entangled
photons - with a visibility of 99.39± 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.
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