Optical coherence in atomic monolayer transition metal dichalcogenides limited by electron-phonon interactions
ORAL
Abstract
We systematically investigate the excitonic dephasing of three representative transition metal dichalcogenides, namely MoS$_{\mathrm{2}}$, MoSe$_{\mathrm{2}}$ and WSe$_{\mathrm{2}}$ atomic monolayer thick and bulk crystals, in order to gain proper understanding of the factors that determine the optical coherence in these materials. Coherent nonlinear optical spectroscopy, temperature dependent absorption combined with `ab initio' theoretical calculations of the phonon spectra, indicate electron-phonon interactions to be the limiting factor.
*The research at USF, Penn. State, and UAB is supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Award DE-SC0012635.
–