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Berlin 2015 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 107: Microcavities, polaritons and condensates

HL 107.2: Vortrag

Freitag, 20. März 2015, 10:30–10:45, EW 015

Polariton condensates in textured microcavity potential landscapes — •Karol Winkler1, Anne Schade1, Julian Fischer1, Robert Dall3, Jonas Geßler1, Elena A. Ostrovskaya3, Martin Kamp1, Christian Schneider1, and Sven Höfling1,21Technische Physik and Wilhelm Conrad Röntgen Center for Complex Material Systems, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany — 2SUPA, School of Physics and Astronomy, University of St. Andrews, St. Andrews KY16 9SS, United Kingdom — 3Nonlinear Physics Centre and AMPL, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 0200, Australia

Exciton-polaritons can be trapped in 0D quantum boxes by either trapping the excitonic or photonic part of these hybrid quasiparticles. Engineering the trapping potential then allows to tailor site-to-site evanescent coupling of the localised polariton mode wavefunctions in a periodic lattice. This leads to the formation of a tailorable polariton bandstructure which can be utilized to simulate complex many-body phenomena in the concept of quantum-simulators.

Here we report on recent measurements below and above bosonic condensation threshold on polariton lattices of different arrangement and dimensionality. The potential landscape in this structures is given by a versatile trapping technique that is based on local elongation of the λ/2-AlAs cavity layer in a high quality microcavity structure with embedded GaAs quantum wells.

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