Vadym Apalkov, Mark I. Stockman
We predict that a metal nanofilm subjected to an ultrashort (single oscillation) optical pulse of a high field amplitude ~3 V/\AA\ at at normal incidence undergoes an ultrafast (at subcycle times less or on the order of 1 fs) transition to a state resembling semimetal. Its reflectivity is greatly reduced, while the transmissivity and the optical field inside the metal are greatly increased. The deposition of the pulse energy as a function of field reaches its maximum and then decreases due to suppression of the active optical resistance. The temporal profiles of the optical fields are predicted to exhibit pronounced subcycle oscillations which are attributed to the Bloch oscillations and formation of the Wannier-Stark ladder of electronic states. These effects are promising for applications as nanoplasmonic modulators and field-effect transistors with petahertz bandwidth.
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http://arxiv.org/abs/1209.2245
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