Dresden 2014 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 95: Polaritons

HL 95.4: Vortrag

Donnerstag, 3. April 2014, 12:15–12:30, POT 051

Textured microcavity trapped polaritons — •Karol Winkler1, Anne Schade1, Julian Fischer1, 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 — 2School of Physics and Astronomy, University of St Andrews, St Andrews, United Kingdom

Trapping of microcavity exciton polaritons by introducing an additional lateral confinement has been shown to support condensation into the bosonic ground state of the system. These 0D polariton traps then, for example, allow the investigation of interacting polariton condensates by enabling arbitrary configurations into advanced lattice structures.

We will focus here on the trapping technique of an elongated textured microcavity. Through an etch-and-overgrowth step a three-dimensional confinement potential for photons and therefore polaritons is introduced. In devices based on a single GaInAs QW in a GaAs λ-cavity, optical and electrical injection of 0D-polaritons has been demonstrated. We will present resonant photocurrent measurements to probe density dependent energy shift of the ground state in such an electrical device.

These systems undergo a transition into weak coupling by further pumping. We will further present a textured microcavity platform that enables arbitrary lattice configurations with deep confinement while condensation in the ground state is possible.

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