title: Exciton binding energy of monolayer WS₂.
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.
authors.affiliation: Physics Department, University of Hong Kong, Hong Kong, China.
authors.forename: Bairen
authors.initials: B
authors.lastname: Zhu
authors.affiliation: Physics Department, University of Hong Kong, Hong Kong, China.
authors.forename: Xi
authors.initials: X
authors.lastname: Chen
authors.affiliation: Physics Department, University of Hong Kong, Hong Kong, China.
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Cui