Rostock 2019 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 48: Quantum Optics II

Q 48.5: Talk

Thursday, March 14, 2019, 11:30–11:45, S Ex 04 E-Tech

Quantum-enhanced imaging — Marta Gilaberte Basset, Josué R. Léon Torres, and •Markus Gräfe — Fraunhofer Institute for Applied Optics and Precision Engineering IOF, Jena, Germany

Nowadays, quantum physics turned from purely fundamental science to a research field with real-life applications. In particular, quantum photonics promises novel approaches for quantum enhanced-imaging. For instance ''quantum imaging with undetected photons'' was first implemented by the Zeilinger group in Vienna. Based on Mandels induced coherence, it becomes possible to image an object with light that never interacted at all with the object. It is worth to explicitly mentioned, thtat in stark contrast to Ghost imaging, here neither any coincidence detection is necessary nor any detection of the light that interacted with the object. By exploiting non-degenerated spontaneous parametric down conversion, photon pairs with large wavelength difference can be harnessed. The obvious advantage of this technique is that the wavelength of the idler photons can be tailored to match the interesting spectral range of the object (e.g. far IR, THz, deep UV). At the same time, the signal photons, which are actually detected, can stay in the VIS range where, e.g., Si-based detectors are optimized. We present a revised implementation of this imaging scheme. Our ansatz aims for robust, miniaturized and mobile realization, by employing a single crystal scheme. Besides the application for biomolecules, fundamental aspects like the influence of spatial correlation vs. momentum correlation on the imaging properties are under investigation.