Dresden 2011 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 38: Polaritons and Polariton Lasing

HL 38.2: Vortrag

Dienstag, 15. März 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.