Affiliation:
1. Universidad de Zaragoza
2. University of Strasbourg and CNRS
Abstract
We investigate the interaction between a monolayer of WS2 and a chiral plasmonic metasurface. WS2 possesses valley excitons that selectively couple with one-handed circularly polarized light. At the same time, the chiral plasmonic metasurface exhibits spin-momentum locking, leading to a robust polarization response in the far field. Using a scattering formalism based on the coupled mode method, we analyze various optical properties of the WS2 monolayer. Specifically, we demonstrate the generation of circular dichroism in the transition metal dichalcogenide (TMD) by harnessing the excitation of surface plasmon polaritons (SPPs) in the metasurface. Moreover, we observe the emergence of other guided modes, opening up exciting possibilities for further exploration in TMD-based devices.
Funder
Institut National de la Santé et de la Recherche Médicale
Centre National de la Recherche Scientifique
Université de Strasbourg
Ministerio de Ciencia e Innovación
Subject
Electronic, Optical and Magnetic Materials