Heidelberg 2015 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 31: Poster: Quantum Optics and Photonics II
Q 31.14: Poster
Tuesday, March 24, 2015, 17:00–19:00, C/Foyer
Excitons in MoS2 coupled to a Microcavity — •Michael Förg1, Hanno Kaupp1,2, Thomas Hümmer1,2, Hisato Yamaguchi3, Theodor W. Hänsch1,2, Alexander Högele1, and David Hunger1,2 — 1Ludwig-Maximilians Universität München Faculty of Physics, Schellingstr. 4/III, D-80799 München, Germany — 2Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, D-85748 Garching, Germany — 3Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
Two-dimensional atomic crystals of transition metals dichalcogenides have come to be a recent field of interest due to their attractive optoelectronic properties. In the scope of this work we investigate the excitons in monolayer molybdenum disulphide (MoS2) coupled to a microcavity. Due to high exciton binding energies and a strong oscillator strength it is possible to observe collective strong coupling of excitons and photons at room temperature[1]. In our experiment we use a tunable open-access cavity with one curved mirror and one planar mirror on top of which MoS2 is placed. This type of setup allows to control the spatial separation of both cavity mirrors and thus to see effects of the confinement on the polariton state. Furthermore we have a defined, microscopic cavity mode, which can form a potential for the exciton polaritons and thus lead to interaction effects. We report on the current state of the experiment.
[1] Liu, Xiaoze, et al. "Strong light-matter coupling in two-dimensional atomic crystals." arXiv preprint arXiv:1406.4826 (2014).