Berlin 2015 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 107: Microcavities, polaritons and condensates
HL 107.2: Talk
Friday, March 20, 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 Höfling1,2 — 1Technische 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.