Hot Carrier Cooling and Trapping in Atomically Thin WS₂ Probed by Three-Pulse Femtosecond Spectroscopy.

ABSTRACT: Transition metal dichalcogenides (TMDs) have shown outstanding semiconducting properties which make them promising materials for next-generation optoelectronic and electronic devices. These properties are imparted by fundamental carrier-carrier and carrier-phonon interactions that are foundational to hot carrier cooling. Recent transient absorption studies have reported ultrafast time scales for carrier cooling in TMDs that can be slowed at high excitation densities via a hot-phonon bottleneck (HPB) and discussed these findings in the light of optoelectronic applications. However, quantitative descriptions of the HPB in TMDs, including details of the electron-lattice coupling and how cooling is affected by the redistribution of energy between carriers, are still lacking. Here, we use femto

SUBMITTER: Wang T 

PROVIDER: S-EPMC10100566 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature