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Frontiers in Optics

Ultra Bright Silicon-on-insulator (SOI) Polarization Entangled Photon Source

Jinyi Du, Xingjian Zhang, Arya Chowdhury, George F. R. Chen, Hongwei Gao, Dawn T. H. Tan, Alexander Ling

Published Jan 1, 2024• 0 citations
Publisher

Abstract

Polarization-entangled photon sources on silicon chips are useful for scalable quantum computing. By employing novel low-loss fiber-chip couplers and optimizing the entire system, we developed an ultra-bright polarization-entangled photon source with > 97% (H/V) and > 94% (D/A) two photon interference visibility at 200,000 observed raw coincidence rate.

DOI
10.1364/fio.2024.fw7c.3

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We demonstrate polarization-entanglement for non-degenerate and degenerate photon-pairs generated through Kerr-nonlinearity in a nano-scale silicon-on-insulator(SOI) waveguide. We use a compact counter propagating configuration to create two-photon polarization-entangled state, |H>|H> + |V>|V>. We observe two-photon interference with visibility > 91% and > 80% for non-degenerate and degenerate photon-pairs, respectively. The experimental structure can be implemented on optical chips as an integrated source of entangled photons for future quantum computer and communication applications.
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