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Landau damping and lifetime oscillation of surface plasmons in metallic thin films studied in a jellium slab model

Zhe Yuan (Institutionen för teknisk fysik, Material- och ytteori) ; Shiwu Gao
Surface Science (0039-6028). Vol. 602 (2008), 2, p. 460.
[Artikel, refereegranskad vetenskaplig]

The lifetime of surface plasmons in metallic thin films has been calculated using linear response theory and time-dependent local density approximation. The linewidth due to Landau damping is found to depend exponentially on the film thickness. It exhibits quantum oscillations in ultrathin films with a period that is about three times longer than the universal period λF/2 observed in other quantities. This period results from the dynamical Friedel oscillations in the collective excitation normal to the films. Its finding has general implications in quantum control of nanoplasmons and their mediated processes across the films and on their surfaces.

Nyckelord: Surface plasmon; Surface plasmon lifetime; Metallic thin films; Thickness dependence; Quantum size effects



Denna post skapades 2008-05-07. Senast ändrad 2010-01-26.
CPL Pubid: 70742

 

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Institutionen för teknisk fysik, Material- och ytteori (1900-2015)
Institutionen för fysik (GU) (GU)

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Ytor och mellanytor

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