S- and P-polarization dependence of localized surface plasmon enhanced photoelectron emission from fractal gold/ITO nanostructures

We report on three-photon photoelectron emission (3-PPE) from gold/ITO nanostructures enhanced by localized surface plasmon "hot spots" and imaged by IR-PEEM. Individual hot spots respond most favorably to polarized light within ±45° of S-polarization. Conversely, the average photoemission...

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Bibliographic Details
Main Authors: Word, R. C., Fitzgerald, J., Konenkamp, R.
Format: Conference Proceeding
Language:English
Subjects:
Gold
Indium tin oxide
Lasers
Lighting
PEEM
Photoelectricity
photoelectron emission
Plasmons
polarization
random nanostructures
surface plasmon
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Summary:We report on three-photon photoelectron emission (3-PPE) from gold/ITO nanostructures enhanced by localized surface plasmon "hot spots" and imaged by IR-PEEM. Individual hot spots respond most favorably to polarized light within ±45° of S-polarization. Conversely, the average photoemission response was strongest for P-polarized light because of the combination of favorable transmission coefficients, the third-order probability of 3-PPE, and the wide angle response of the hot spots.
ISSN:1944-9399
1944-9380
DOI:10.1109/NANO.2011.6144427