Anisotropic dispersion and partial localization of acoustic surface plasmons on an atomically stepped surface: Au(788).
Phys Rev Lett
; 113(18): 186804, 2014 Oct 31.
Article
em En
| MEDLINE
| ID: mdl-25396388
ABSTRACT
Understanding acoustic surface plasmons (ASPs) in the presence of nanosized gratings is necessary for the development of future devices that couple light with ASPs. We show here by experiment and theory that two ASPs exist on Au(788), a vicinal surface with an ordered array of monoatomic steps. The ASPs propagate across the steps as long as their wavelength exceeds the terrace width, thereafter becoming localized. Our investigation identifies, for the first time, ASPs coupled with intersubband transitions involving multiple surface-state subbands.
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MEDLINE
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En
Revista:
Phys Rev Lett
Ano de publicação:
2014
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Article
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Itália