Work

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

Year: 2024

Type: article

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 downconversion in a non-degenerate and type-0 process. We obtain a state fidelity of F = 0.975 ± 0.004 and violate a Clauser-Horne-Shimony-Holt (CHSH) inequality with $\mathcal {S}=2.75\pm 0.01$. 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 ± 12 spatial modes.

Source: Optics Letters

DOI: 10.1364/ol.536820

Authors: Minjae Hong, Rodrigo Gómez, Valerio Flavio Gili, Jorge Fuenzalida, Markus Gräfe