Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 27: Poster: Quantum Optics and Photonics II
Q 27.14: Poster
Dienstag, 1. März 2016, 16:30–19:00, Empore Lichthof
Microstructuring of Trapping Potentials for Coupled Photon Condensates — •Christian Kurtscheid1, Erik Busley1, David Dung1, Tobias Damm1, Julian Schmitt1, Frank Vewinger1, Jan Klärs2, and Martin Weitz1 — 1Institut für Angewandte Physik, Universität Bonn — 2Institut für Quantenelektronik, ETH Zürich
We present recent work on multiple coupled photon condensates in a single optical microcavity. Unlike Bose-Einstein condensates of dilute atomic gases, the realization of a photon condensate is not feasible using a blackbody radiator by cooling, because the photons then simply vanish in the system walls. In recent work we have realized Bose-Einstein condensation of photons in a dye-filled optical microcavity at room temperature. The dye-solution acts both as a heat bath and particle reservoir for the the trapped photon gas. Thermal contact to the dye-solution is achieved by subsequent absorption and reemission processes. The microresonator introduces a low frequency cutoff to the dispersion relation, resulting in a non-trivial ground state. The harmonically trapped photon gas is formally equivalent to a 2D gas of massive bosons. We present measurements on photon tunneling between lattice sites and their creation with the polymer. New approaches of cavity pumping are presented. Further, in a more recent approach we have developed a permanent microstructuring technique to create variable trapping potentials for the photon gas in the microcavity.