Journal article · Preprint article
Plasmon-exciton polaritons in two-dimensional semiconductor/metal interfaces
Center for Nanostructured Graphene, Centers, Technical University of Denmark1
Department of Photonics Engineering, Technical University of Denmark2
Structured Electromagnetic Materials, Department of Photonics Engineering, Technical University of Denmark3
Technical University of Denmark4
Department of Micro- and Nanotechnology, Technical University of Denmark5
The realization and control of polaritons is of paramount importance in the prospect of novel photonic devices. Here, we investigate the emergence of plasmon-exciton polaritons in hybrid structures consisting of a two-dimensional transition-metal dichalcogenide (TMDC) deposited onto a metal substrate or coating a metallic thin film.
We determine the polaritonic spectrum and show that, in the former case, the addition of a top dielectric layer and, in the latter case, the thickness of the metal film can be used to tune and promote plasmon-exciton interactions well within the strong-coupling regime. Our results demonstrate that Rabi splittings exceeding 100 meV can readily be achieved in planar dielectric/TMDC/metal structures under ambient conditions.
We thus believe that this Rapid Communication provides a simple and intuitive picture to tailor strong coupling in plexcitonics with potential applications for engineering compact photonic devices with tunable optical properties.
Language: | English |
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Year: | 2018 |
Pages: | 6 |
ISSN: | 1550235x , 10980121 , 24699969 and 24699950 |
Types: | Journal article and Preprint article |
DOI: | 10.1103/PhysRevB.97.041402 |
ORCIDs: | Gonçalves, P. A. D. , Xiao, Sanshui and Mortensen, N. Asger |