Dresden 2017 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 63: Poster: Quantum Dots and Optics

HL 63.2: Poster

Mittwoch, 22. März 2017, 15:00–19:00, P1A

Creation of long-living exciton polariton like states: The impact of pulsed excitation to a steady-state condensate — •Daniel Schmidt¹, Bernd Berger¹, Marc Assmann¹, Martin Kamp², Christian Schneider², Sven Höfling², and Manfred Bayer¹ — ¹Experimentelle Physik 2, Technische Universität Dortmund, D-44227 Dortmund, Germany — ²Technische Physik, Physikalisches Institut, Wilhelm Conrad Röntgen Research Center for Complex Material Systems, Universität Würzburg, D-97074 Würzburg, Germany

High quality GaAs microcavities offer the possibility to investigate long-living and therefore far traveling exciton polariton condensates. Although much research has been performed using continuous-wave (CW) and pulsed excitation to drive the condensation, few studies investigated the differences in the build-up of the exciton polariton condensation process. We present the impact of pulsed excitation near the threshold power on a steady-state exciton polariton condensate that is confined by a CW pumped ring potential. After the initial decay of the pulsed excited condensate, a surprisingly long-living polariton-like state arises that exceeds the polariton lifetime by an order of magnitude.