Article
Photoelectron Emission Control with Polarized Light in Plasmonic Metal Random Structures
Applied Physics Letters
Document Type
Article
Publication Date
1-1-2011
Subjects
- Photoemission,
- Plasmons (Physics),
- Polaritons
Disciplines
Abstract
The authors 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° polarization change can result in on/off ratios of ∼100 for electron emission.
Persistent Identifier
http://archives.pdx.edu/ds/psu/7146
Citation Information
Word, R. C., Fitzgerald, J., & Konenkamp, R. (2011). Photoelectron emission control with polarized light in plasmonic metal random structures. [Article]. Applied Physics Letters, 99(4), 3.
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