| Autor: |
Mannebach EM; Department of Materials Science and Engineering, Stanford University , Stanford, California 94305, United States., Duerloo KA, Pellouchoud LA, Sher MJ, Nah S, Kuo YH, Yu Y, Marshall AF, Cao L, Reed EJ, Lindenberg AM |
| Jazyk: |
angličtina |
| Zdroj: |
ACS nano [ACS Nano] 2014 Oct 28; Vol. 8 (10), pp. 10734-42. Date of Electronic Publication: 2014 Sep 29. |
| DOI: |
10.1021/nn5044542 |
| Abstrakt: |
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. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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