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HL: Fachverband Halbleiterphysik

HL 2: 2D Materials and Heterostructures: Photonic Aspects

HL 2.10: Talk

Monday, March 18, 2024, 12:00–12:15, EW 201

2D Semiconductor-Plasmonic Hybrids: Strong Coupling, Exciton Localization, and Single Photon Emission — •Lara Greten, Robert Salzwedel, Malte Selig, and Andreas Knorr — Nichtlineare Optik und Quantenelektronik, Institut für Theoretische Physik, Technische Universität Berlin, Germany

Monolayers of transition metal dichalcogenides (TMDCs) display strong light-matter interaction dominated by tightly bound excitons. In contrast, metal nanostructures support localized plasmons, allowing for nanoscale electric field control. This talk is focused on a microscopic description of the interplay between excitons and plasmons, combining Maxwell’s and excitonic Bloch equations [1,2,3]. The theory is applied to three situations: (a) exciton localization within plasmon-induced near-field potentials [2], (b) exciton-plasmon strong coupling in 2D lattices with a spectral splitting of 100 meV [3], and (c) Purcell-enhanced single-photon generation [4].

[1] L. Greten, R. Salzwedel et al., physica status solidi (a) 2300102 (2023)

[2] R. Salzwedel, L. Greten et al., arXiv:2305.11099 (2023)

[3] L. Greten, R. Salzwedel et al., arXiv:2309.09673 (2023)

[4] M. von Helversen, L. Greten et al., 2D Mater. 10 045034 (2023)

Keywords: transition metal dichalchogenides; excitons; plasmons; strong coupling