Freiburg 2019 – scientific programme
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FM: Fall Meeting
FM 8: Enabling Technologies: Sources of Quantum States of Light I
FM 8.4: Talk
Monday, September 23, 2019, 15:00–15:15, 1010
Photonic Quantum Gases in Microstructured Potentials for Light — •Andreas Redmann1, Christian Kurtscheid1, David Dung1, Julian Schmitt1,2, Frank Vewinger1, and Martin Weitz1 — 1Institut für Angewandte Physik, Universität Bonn, Wegelerstr. 8, D-53115 Bonn — 2present address: Department of Physics, University of Cambrigde, Cambridge, United Kingdom
In earlier work, Bose-Einstein Condensation of light has been realised in a dye-filled optical microcavity at room temperature. A low-frequency cutoff is introduced by the short mirror spacing and thermal contact to the dye solution is obtained by repeated absorption and re-emission cycles on the dye molecules. Here we report on advances in a spatially resolved delamination-based adaptive optics technique to imprint arbitrarily shaped trapping potentials for light in optical dye microcavities. To characterize the imprinting technique, we have studied the mirror reflectivity versus the delamination height. At present, we have thermalized a photon gas in the low-energy spatial superposition state of a double-well potential, which allows us to demonstrate irreversible splitting of light by cooling. Our technique holds promise for the generation of highly entangled optical many body states.