SAMOP 2023 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 58: Quantum Optics with Photons I
Q 58.8: Vortrag
Donnerstag, 9. März 2023, 16:15–16:30, F442
Phase-quadrature quantum imaging with undetected light — •Björn Haase1,2, Joshua Hennig1,2, Mirco Kutas1,2, Erik Waller1, Julian Hering2, Georg von Freymann1,2, and Daniel Molter1 — 1Fraunhofer Institute for Industrial Mathematics ITWM, Fraunhofer-Platz 1, 67663 Kaiserslautern — 2Department of Physics and Research Center OPTIMAS, Technische Universität Kaiserslautern (TUK), 67663 Kaiserslautern
The use of nonlinear interferometers allows sensing with undetected photons. The corresponding experiments base on biphotons that are generated by spontaneous parametric down-conversion. They enable the transfer of spectral properties from one spectral range that is usually hard to investigate to photons from another spectral region easier to observe. By detecting these signal photons, the interaction of a sample with the idler light can be investigated. So far, the sample’s information in terms of both phase and transmittance is received by measuring the corresponding interferogram, which is achieved by multiple recordings with phase changes in between. On this conference, I will present an alternative phase-quadrature approach with a nonlinear interferometer used for imaging with undetected light in the NIR range. With this development, in which we use wave plates and a polarizing beam splitter, we are able to obtain both the phase and visibility with one single image acquisition without the requirement to change optical paths or phases. Thus, with the reduced measurement duration it becomes possible to observe dynamic processes like the drying of an isopropanol film with this kind of nonlinear interferometer.