Berlin 2024 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 2: 2D Materials and Heterostructures: Photonic Aspects
HL 2.11: Vortrag
Montag, 18. März 2024, 12:15–12:30, EW 201
Light-matter interaction of TMDCs in an open cavity — •Shiyu Huang1, Edith Wietek2, Johannes Düreth1, Simon Betzold1, Monika Emmerling1, Takashi Taniguchi3, Kenji Watanabe3, Sven Höfling1, Alexey Chernikov2, and Sebastian Klembt1 — 1Julius-Maximilians-Universität Würzburg, Physikalisches Institut and Würzburg-Dresden Cluster of Excellence ct.qmat, Lehrstuhl für Technische Physik, Am Hubland, 97074 Würzburg, Deutschland — 2Institute of Applied Physics and Würzburg-Dresden Cluster of Excellence ct.qmat, Technische Universität Dresden, 01062 Dresden, Germany — 3Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
Excitons in monolayer transition metal dichalcogenides (TMDCs) and their heterostructures can strongly couple to electromagnetic fields, and monolayer WS2 is a fascinating medium for studying hybrid light-matter states at room temperature. We report the monolayer WS2 encapsulated in hBN employed in an open cavity, where two distributed Bragg reflectors were utilized to strongly confine the photonic field. When reducing the cavity length and thus the number of cavity modes, we reach the strong coupling regime of light-matter interaction at room temperature. Structured cavity mirrors are employed to study polariton physics and has potential to investigate exciton-polariton interactions. Furthermore, the open cavity approach paves the way to integration of WS2/WSe2 heterostructure with Moiré supperlattices in high-Q microcavities, which is promising to study exciton topology.
Keywords: TMDCs; Exciton-polariton; strong coupling; room temperature; open cavity