期刊
APPLIED PHYSICS LETTERS
卷 99, 期 4, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3615783
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资金
- Basic Science Office of the Department of Energy [DEFG02-07ER46406]
We report on the possibility of switching the emission rate of photoelectrons by polarization changes in the plasmon excitation light. Photoelectron emission is strongly enhanced in the near-field of localized surface plasmons and occurs from areas with typical diameters of 20-70 nm. The underlying physical process involves excitation of a localized surface plasmon polariton with a femtosecond laser pulse, and a subsequent multi-photon photoemission process. The non-linearity of this process leads to a sharp polarization dependence that allows efficient switching of the emission. We demonstrate that a 90 degrees polarization change can result in on/off ratios of similar to 100 for electron emission. (C) 2011 American Institute of Physics. [doi:10.1063/1.3615783]
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