Local Optical Properties in CVD-Grown Monolayer WS₂ Flakes.

ABSTRACT: Excitons dominate the light absorption and re-emission spectra of monolayer transition-metal dichalcogenides (TMD). Microscopic investigations of the excitonic response in TMD almost invariably extract information from the radiative recombination step, which only constitutes one part of the picture. Here, by exploiting imaging spectroscopic ellipsometry (ISE), we investigate the spatial dependence of the dielectric function of chemical vapor deposition (CVD)-grown WS₂ flakes with a microscopic lateral resolution, thus providing information about the spatially varying, exciton-induced light absorption in the monolayer WS₂. Comparing the ISE results with imaging photoluminescence spectroscopy data, the presence of several correlated features was observed, along with the

SUBMITTER: Magnozzi M 

PROVIDER: S-EPMC8411805 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature