Strong light-matter coupling in two-dimensional atomic crystals

Abstract

Two dimensional (2D) atomic crystals of graphene, and transition metal dichalcogenides have emerged as a class of materials that show strong light-matter interaction. This interaction can be further controlled by embedding such materials into optical microcavities. When the interaction is engineered to be stronger than the dissipation of light and matter entities, one approaches the strong coupling regime resulting in the formation of half-light half-matter bosonic quasiparticles called microcavity polaritons. Here we report the evidence of strong light-matter coupling and formation of microcavity polaritons in a two dimensional atomic crystal of molybdenum disulphide (MoS2) embedded inside a dielectric microcavity at room temperature. A Rabi splitting of 46 meV and highly directional emission is observed from the MoS2 microcavity owing to the coupling between the 2D excitons and the cavity photons. Realizing strong coupling effects at room temperature in a disorder free potential landscape is central to the development of practical polaritonic circuits and switches.

25 pages, 7 figures

References in corpus (5)

• Two Dimensional Atomic Crystals
• Valley polarization in MoS2 monolayers by optical pumping
• Synthesis of Large-Area MoS2 Atomic Layers with Chemical Vapor Deposition
• Probing the Dynamics of Spontaneous Quantum Vortices in Polariton Superfluids
• Comparison of strong coupling regimes in bulk GaAs, GaN and ZnO semiconductor microcavities

Cited by in corpus (5)

• k.p theory for two-dimensional transition metal dichalcogenide semiconductors
• Photocurrent generation with two-dimensional van der Waals semiconductors
• Topological Polaritons
• Photonic Architectures for Equilibrium High-Temperature Bose-Einstein Condensation in Dichalcogenide Monolayers
• Monolayer Excitonic Laser