Regensburg 2025 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 2: 2D Semiconductors and van der Waals Heterostructures I

HL 2.13: Vortrag

Montag, 17. März 2025, 12:45–13:00, H15

Strong coupling between light confined in a dielectric nanocavity and excitons in a monolayer TMDC — •Frederik Schröder^{1, 2}, Paweł Wyborski¹, Meng Xiong^{1, 2}, George Kountouris^{1, 2}, Battulga Munkhbat¹, Martijn Wubs^{1, 2}, Philip T. Kristensen^{1, 2}, Jesper Mørk^{1, 2}, and Nicolas Stenger^{1, 2} — ¹Department of Electrical and Photonics Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark — ²NanoPhoton - Center for Nanophotonics, Technical University of Denmark, Ørsteds Plads 345A, DK-2800 Kgs. Lyngby, Denmark

Enhancing light-matter interactions with optical nanocavities is essential for many applications, such as nanolasers and quantum technologies. Recently, advances in the design and fabrication of extreme dielectric confinement (EDC) cavities enabled the confinement of electromagnetic fields in InP on the tens of nanometer scale without being limited by absorption losses [1]. We demonstrate experimentally strong light-matter interactions between excitons in a single layer of MoTe₂ and light confined in an EDC nanocavity. The avoided crossing of the system is verified with both photoluminescence and reflection measurements. The observed Rabi-energy of 10.1 meV exceeds the averaged losses in the system [2]. These results pave the way for future studies on nonlinearities at the single-photon level [3]. [1] M. Xiong et al., Opt. Mater. Express, 14, 397 (2023), [2] F. Schröder et al., in preparation, [3] E. V. Denning et al., Phys. Rev. Res., 4, L012020 (2022)

Keywords: Dielectric nanocavity; Extreme dielectric confinement; Transition metal dichalcogenides