We present a frequency-correlated non-degenerate photon-pair source consisting of a second-order nonlinear crystal that generates ultraviolet UV-A and infrared light via spontaneous parametric down-conversion. Quantum imaging and sensing techniques like quantum imaging with undetected light and quantum ghost imaging leverage on wavelength correlations between down-converted photon pairs to decouple sensing and detection wavelengths, thereby exploiting established camera technology within the visible spectrum. Our results open up novel quantum sensing application scenarios in the ultraviolet domain, with potential implications for advancements in biomedical and non-destructive testing fields.
@article{arxiv.2505.13721,
title = {Non-degenerate SPDC photon-pair source for UV-A illumination},
author = {Preetisha Goswami and Marta Gilaberte Basset and Jorge Fuenzalida and Markus Gräfe and Valerio Flavio Gili},
journal= {arXiv preprint arXiv:2505.13721},
year = {2025}
}