Ultrafast Electronic and Structural Response of Monolayer MoS2 under Intense Photoexcitation Conditions
Source abstract
Abstract
We report on the dynamical response of single layer transition metal dichalcogenide MoS2 to intense above-bandgap photoexcitation using the nonlinear-optical second order susceptibility as a direct probe of the electronic and structural dynamics. Excitation conditions corresponding to the order of one electron-hole pair per unit cell generate unexpected increases in the second harmonic from monolayer films, occurring on few picosecond time-scales. These large amplitude changes recover on tens of picosecond time-scales and are reversible at megahertz repetition rates with no photoinduced change in lattice symmetry observed despite the extreme excitation conditions.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: 2D Materials and Applications · Perovskite Materials and Applications · Plasmonic and Surface Plasmon Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
Department of Electrical Engineering, Stanford University, Stanford, California 94305, United States
Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
Stanford Nanocharacterization Laboratory, Stanford University, Stanford, California 94305, United States
PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
Funding
Army Research Office · Basic Energy Sciences
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