Strong coupling between monolayer quantum emitter WS2 and degenerate/non-degenerate surface lattice resonances

Strong light-matter coupling manifested by Rabi splitting has drawn considerable interest owing to its fundamental significance for impressive interaction enhancement in the fields of ultrafast active plasmonic devices and quantum information. In this paper, we investigate the coherent optical properties of a plasmonic system consisting of periodic metal nanoparticle arrays covered by a WS2 thin film of atomic layer thickness. The coupling factor, energy splitting, and temporal dynamics of this coherent coupling phenomenon are quantitatively revealed by finite-difference time-domain (FDTD) simulation and a full quantum mechanical model proves that the exciton behavior of the fermionic quantum emitter WS2 is carefully modulated by bosonic surface lattice resonances. This work may pave the way for coherent modulation of polariton and plasmon devices and can potentially open up diverse exciting possibilities like nanoscale light sources, single-photon emitters, and all-optical transistors. (C) 2021 Optica Publishing Group

Automated summary

In this paper, the coherent optical properties of a plasmonic system consisting of metal nanoparticle arrays and a WS2 thin film were investigated. The coupling factor, energy splitting, and temporal dynamics of this coherent coupling phenomenon were quantitatively revealed, and it was found that the exciton behavior of WS2 is modulated by surface lattice resonances. This work may open up new possibilities for the coherent modulation of polariton and plasmon devices.