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Q: Fachverband Quantenoptik und Photonik
Q 8: Nanophotonics and Integrated Photonics II
Q 8.4: Vortrag
Montag, 2. März 2026, 18:00–18:15, P 3
Macroscopic monolayer WS2 for robust room-temperature exciton-polaritons in open cavities — •Sander Scheel1, Shiyu Huang1, Jiang Qu2, Johannes Düreth1, Dominik Horneber1, Simon Widmann1, Monika Emmerling1, Martin Kamp1, Simon Betzold1, Sven Höfling1, and Sebastian Klembt1 — 1Technische Physik, Wilhelm-Conrad-Röntgen-Research Center for Complex Material Systems, and Würzburg-Dresden Cluster of Excellence ct.qmat, University of Würzburg, Germany — 2Leibniz-Institute for Solid State and Materials Research Dresden
Combining two-dimensional materials with photonic lattices offers a powerful route toward tunable exciton-polariton devices using engineered band structures, yet progress has been limited by the poor reproducibility of conventional exfoliation methods. Here, we demonstrate large-area monolayer WS2 with high optical uniformity using Au-assisted exfoliation and 1-dodecanol encapsulation, providing a scalable platform for exciton-polariton studies. Room-temperature strong coupling with a Rabi splitting of 31 meV is achieved in open microcavities, yielding polaritonic spectra consistent with literature while eliminating sample-to-sample variability. Implementing a kagome photonic lattice enables the realization of polariton band structures, including Dirac cones and flat bands. These results establish large-area monolayer semiconductors as a robust basis for controllable polaritonic lattices at room-temperature.
Keywords: Exciton-Polariton; Open-cavity; van-der-Waals material; Room-temperature; Kagome