We investigate the excitonic dephasing of transition metal dichalcogenides, namely MoS2, MoSe2 and WSe2 atomic monolayer thick and bulk crystals, in order to understand the factors that determine the optical coherence in these materials. Coherent nonlinear optical spectroscopy, temperature dependent absorption combined with theoretical calculations of the phonon spectra, reveal the important role electron-phonon interactions plat in dephasing process. The temperature dependence of the electronic band gap and the excitonic linewidth combined with 'ab initio' calculations of the phonon energies and the phonon density of state reveal strong interaction with the E' and E" phonon modes.
|Original language||English (US)|
|Journal||Journal of Physics: Conference Series|
|State||Published - Aug 15 2017|
|Event||33rd International Conference on the Physics of Semiconductors, ICPS 2016 - Beijing, China|
Duration: Jul 31 2016 → Aug 5 2016
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)