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IEEE Photonics Conference

Foundry-fabricated silicon source of broadband polarization entanglement

Alexander Miloshevsky, Lucas M. Cohen, Karthik V. Myilswamy, Saleha Fatema, Muneer Alshowkan, Hsuan‐Hao Lu, Andrew M. Weiner, Joseph M. Lukens

Published Nov 12, 2023• 1 citation
Publisher

Abstract

We present a CMOS-fabricated photonic integrated circuit tailored to the generation of ultrabroadband polarization-entangled photons. This fully on-chip source leverages a novel design combining polarization splitter-rotators and a bidirectionally pumped microring resonator to produce high-fidelity polarization Bell states over 115 frequency-bin pairs spaced 38.4 GHz apart.

DOI
10.1109/ipc57732.2023.10360784

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Photonic integrated circuits (PICs) based on silicon-on-insulator (SOI) substrates provide a lightweight, compact platform for applications in quantum optics. We show the evaluation and characterization of an SOI-bascd PIC design for an entangled photon pair source, generating photon pairs by means of the nonlinear process of spontaneous four-wave mixing in microring resonators. Experimental results following from the chip fabrication fed back into the simulated parameter tuning effects, culminating in photon pair generation with measured correlations exceeding classically predicted limits.
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