Plasmon-exciton polaritons in 2D semiconductor/metal interfaces
Abstract
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 (2D) 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, 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 be readily achieved in planar dielectric/TMDC/metal structures under ambient conditions. We thus believe that this work provides a simple and intuitive picture to tailor strong coupling in plexcitonics, with potential applications for engineering compact photonic devices with tunable optical properties.
Cite
@article{arxiv.1710.04879,
title = {Plasmon-exciton polaritons in 2D semiconductor/metal interfaces},
author = {P. A. D. Gonçalves and L. P. Bertelsen and Sanshui Xiao and N. Asger Mortensen},
journal= {arXiv preprint arXiv:1710.04879},
year = {2018}
}
Comments
6 pages, including 5 figures and references