Exciton binding energy of monolayer WS₂

Bairen Zhu; Xi Chen; Xiaodong Cui

doi:10.1038/srep09218

Exciton binding energy of monolayer WS₂

Sci Rep. 2015 Mar 18:5:9218. doi: 10.1038/srep09218.

Authors

Bairen Zhu¹, Xi Chen¹, Xiaodong Cui¹

Affiliation

¹ Physics Department, University of Hong Kong, Hong Kong, China.

Abstract

The optical properties of monolayer transition metal dichalcogenides (TMDC) feature prominent excitonic natures. Here we report an experimental approach to measuring the exciton binding energy of monolayer WS₂ with linear differential transmission spectroscopy and two-photon photoluminescence excitation spectroscopy (TP-PLE). TP-PLE measurements show the exciton binding energy of 0.71 ± 0.01 eV around K valley in the Brillouin zone.

Publication types

Research Support, Non-U.S. Gov't