Polarization-entangled photon pair source using beam displacers and thin crystals

• URL: http://arxiv.org/abs/2405.04360v2
• Date: Wed, 16 Oct 2024 22:12:19 GMT
• Title: Polarization-entangled photon pair source using beam displacers and thin crystals
• Authors: Minjae Hong, Rodrigo Gomez, Valerio Flavio Gili, Jorge Fuenzalida, Markus Gräfe,
• Abstract summary: We present an experimental implementation of a polarization-entangled photon pair source based on beam displacers. The down-converted photons are emitted via spontaneous parametric down-conversion in a non-degenerate and type-0 process. Our source also uses thin crystals for applications in quantum imaging, taking advantage of the large number of spatial modes.
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• Abstract: We present an experimental implementation of a polarization-entangled photon pair source based on beam displacers. The down-converted photons are emitted via spontaneous parametric down-conversion in a non-degenerate and type-0 process. We obtain a state fidelity of $F=0.975\pm0.004$ and violate a Clauser-Horne-Shimony-Holt inequality with $S=2.75\pm0.01$. Our source also uses thin crystals for applications in quantum imaging, taking advantage of the large number of spatial modes. We estimate that our source could produce 550$\pm$12 spatial modes.

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