Polarization-entangled photon-pair source using beam displacers and thin crystals
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.
Authors
- Markus Gräfe (ORCID: https://orcid.org/0000-0001-8361-892X)
- Jorge Fuenzalida (ORCID: https://orcid.org/0000-0001-7099-1901)
- Valerio Flavio Gili (ORCID: https://orcid.org/0000-0001-8723-9986)
- Rodrigo Gómez (ORCID: https://orcid.org/0000-0001-8712-9074)
- Minjae Hong
Institutions
- Technische Universität Darmstadt (DE)
- Max Planck Institute for the Science of Light (DE)
- Fraunhofer Institute for Applied Optics and Precision Engineering (DE)
- Friedrich Schiller University Jena (DE)
Publication Details
- Journal
- Optics Letters
- Published
- 2024-09-09
- DOI
- https://doi.org/10.1364/ol.536820
- Citations
- 4
- Primary Topic
- Quantum Information and Cryptography
- Type
- article
- Field-Weighted Citation Impact
- 1.39
Funders
- Horizon 2020 Framework Programme