Dresden 2020 – scientific programme
The DPG Spring Meeting in Dresden had to be cancelled! Read more ...
Parts | Days | Selection | Search | Updates | Downloads | Help
DS: Fachverband Dünne Schichten
DS 11: 2D semiconductors and van der Waals heterostructures II (joint session HL/DS)
DS 11.9: Talk
Monday, March 16, 2020, 17:45–18:00, POT 81
Bosonic Condensation in a hybrid monolayer MoSe2-GaAs-microcavity — •Max Waldherr1, Nils Lundt1, Martin Klaas1, Simon Betzold1, Matthias Wurdack2, Anton Nalitov3, Sefaattin Tongay4, Elena Ostrovskaya2, Alexey Kavokin3, Sven Höfling1,5, and Christian Schneider1 — 1Technische Physik, Physikalisches Institut and Wilhelm Conrad Röntgen Research Center for Complex Material Systems, Universität Würzburg, Germany — 2Nonlinear Physics Centre, Research School of Physics and Engineering, Australian National University, Canberra, Australia — 3Physics and Astronomy School, University of Southampton, Highfield, Southampton, UK — 4School for Engineering of Matter, Transport, and Energy, Arizona State University, Tempe, Arizona, USA — 5SUPA, School of Physics and Astronomy, St. Andrews, UK
We observe bosonic condensation in a hybrid exciton-polariton system in the strong-coupling regime, with monolayer MoSe2 and GaAs quantum well excitons collectively coupling to a Tamm-plasmon mode. The onset of condensation in the hybrid polariton branch manifests in a superlinear increase of its emission intensity, accompanied by a distinct collapse of the linewidth, a core sign of temporal coherence. At further increasing pumping powers, we observe a continuing blueshift of the resonance originating from particle interactions with uncondensed excitons in the reservoir states. The spin-polarized emission is a clear sign of valley-selective condensation.