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THU: Thursday Contributed Sessions

THU 13: Poster Session: Applications

THU 13.74: Poster

Thursday, September 11, 2025, 16:30–18:30, ZHG Foyer 1. OG

Resonator enhanced NIR-MIR correlations for cancer cell detection — Roman Schnabel, Axel Schönbeck, Jan Südbeck, and •Rene Reichow — University of Hamburg, Hamburg, Germany

Using quantum correlations between pairs of photons allows to measure systems with a higher precision than non-correlated light would allow.

This work implements a ring resonator to produce entangled near-infrared (NIR) and mid-infrared (MIR) photons in a SU(1,1) interferometer for the QUANCER collaboration. The MIR photons are then used to interrogate biological samples for cancer cells inside the interferometer. Through the entanglement, however, the attained signal is measured in the NIR spectrum. This allows the use of more efficient detectors, increasing the SNR of the attained result.

Beyond the detection of cancer cells the setup provides a platform for other spectroscopic analyses using undetected photons.

Keywords: Undetected photons; Cancer; Non-linear interferometry; Entanglement