Erlangen 2018 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 37: Quantum Gases (Bosons) IV

Q 37.6: Talk

Tuesday, March 6, 2018, 15:15–15:30, K 2.020

Towards photon Bose-Einstein condensation in a quantum dot microcavity — •Thilo vom Hövel, Christian Kurtscheid, David Dung, Erik Busley, Tobias Damm, Hadiseh Alaeian, Frank Vewinger, and Martin Weitz — Institut für Angewandte Physik, Universität Bonn, Wegelerstr. 8, D-53115 Bonn

Bose-Einstein condensation has been achieved with cold atoms, exciton-polaritons, and more recently with photons in a dye-filled optical microcavity. In the latter work, thermalization of the photon gas is achieved by subsequent absorption and re-emission cycles of photons in the dye molecules. A non-trivial energy ground state is created by the long-wavelength cutoff introduced by the short mirror separation of the used cavity.

In the present work, semi-conductor quantum dots are investigated as a potential alternative to organic dyes as thermalization mediator. For this, the applicability of the Kennard-Stepanov theory to quantum dot absorption and emission spectra has been investigated. We are currently working on the observation of thermalization and Bose-Einstein condensation of photons in a quantum dot-filled optical microcavity. The current status of the experiment will be presented.