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.

6 pages, including 5 figures and references

References in corpus (9)

• Two Dimensional Atomic Crystals
• Strong coupling between surface plasmon polaritons and emitters
• Measurement of the optical dielectric function of transition metal dichalcogenide monolayers: MoS2, MoSe2, WS2 and WSe2
• Strong light-matter coupling in two-dimensional atomic crystals
• Sub-diffractional, volume-confined polaritons in a natural hyperbolic material: hexagonal boron nitride
• Imaging exciton-polariton transport in MoSe2 waveguides
• Probing the influence of dielectric environment on excitons in monolayer WSe2: Insight from high magnetic fields
• Strong coupling in the far-infrared between graphene plasmons and the surface optical phonons of silicon dioxide
• Modeling the Excitation of Graphene Plasmons in Periodic Grids of Graphene Ribbons: An Analytical Approach

Cited by in corpus (15)

• Enhanced Light-Matter Interaction in Two-Dimensional Transition Metal Dichalcogenides
• Single-crystalline gold nanodisks on WS${}_2$ mono- and multilayers: Strong coupling at room temperature
• Exciton-Photonics: From Fundamental Science to Applications
• Two-dimensional plasmonic polarons in n-doped monolayer MoS2
• Tunable optical nonlinearity for TMD polaritons dressed by a Fermi sea
• Polaritonic Critical Coupling in a Hybrid Quasi-Bound States in the Continuum Cavity-WS${}_2$ Monolayer System
• Exciton-Plasmon Coupling in 2D Semiconductors by Surface Acoustic Waves
• Self-hybridisation between interband transitions and Mie modes in dielectric nanoparticles
• Probing excitons with time-resolved momentum microscopy
• Copper plasmonics with excitons
• The Importance of Pure Dephasing in the Optical Response of Excitons in High-quality van der Waals Heterostructures
• Optical to microwave frequency conversion with Rydberg excitons
• Localized polariton states in a photonic crystal intercalated by a transition metal dichalcogenide monolayer
• The Transmission Line Model for 2D Materials and van der Waals Heterostructures
• Image polaritons in van der Waals crystals