Dresden 2017 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 4: Focus Session: Two-dimensional materials I (jointly with HL/TT)
DS 4.9: Vortrag
Montag, 20. März 2017, 12:30–12:45, POT 81
Tamm-Plasmon Exciton-Polaritons with a WS2 monolayers at room temperature — •Sebastian Stoll1, Nils Lundt1, Christian Schneider1, and Sven Höfling1,2 — 1Technische Physik and Wilhlem-Conrad-Röntgen Research Center for Complex Material Systems, Universität Würzburg, D-97074 Würzburg, Am Hubland, Germany — 2SUPA, School of Physics and Astronomy, University of St. Andrews KY 16 9SS, UK
We demonstrate the formation of room temperature Tamm-plasmon Exciton-polaritons with a WS2 monolayer. Due to their high oscillator strength and stable excitonic complexes at 300 K, transition metal dichalcogenide monolayers have awaken strong interest in the field of light-matter interaction at high temperatures. Recently, WS2 was brought into the strong coupling regime by embedding it into both an open-cavity [1] and a Fabry-Perot-cavity consisting of two silver mirrors [2]. In this experiment, the use of a Tamm structure provides us with a narrower cavity linewidth and thus with a higher cavity Q-factor. The exciton-polariton dispersion was measured by momentum-resolved PL spectroscopy. The acquired dispersion shows the expected avoided crossing behaviour of the two polariton branches and yields a Rabi splitting of around 27 meV. References: [1] L.C. Flatten et al., Scientific Reports 6, 33134 (2016) [2] S. Wang et al., Nano Letters 16, 7 (2016)