Dresden 2011 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 38: Polaritons and Polariton Lasing
HL 38.2: Talk
Tuesday, March 15, 2011, 12:15–12:30, FOE Anorg
From polariton condensates to highly photonic quantum degenerate states of bosonic matter — •Franziska Veit1, Marc Aßmann1, Jean-Sebastian Tempel1, Manfred Bayer1, Arash Rahimi-Iman2, Andreas Löffler2, Sven Höfling2, Stephan Reitzenstein2, Lukas Worschech2, and Alfred Forchel2 — 1Experimentelle Physik 2, Technische Universität Dortmund,44221 Dortmund — 2Technische Physik, Physikalische Institut und Wilhelm Conrad Röntgen Research Center for Complex Material Systems, Universität Würzburg, 97074 Würzburg
Bose-Einstein condensation (BEC) of exciton-polaritons in microcavities is considered to be a non-equilibrium process of a degenerate polariton gas in self-equilibrium. We are able to show several key signatures of Bose Einstein condensation BEC without fulfilling the self-equilibrium condition in a highly photonic quantum degenerate non-equilibrium system. Using a planar GaAs/GaAlAs microcavity we observe a buildup of a macroscopic ground state occupation, supressed quantum fluctuations and a linearization of the excitation spectrum.