Dresden 2009 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 20: Nano-optics of metallic and semiconducting nanostructures (time resolved)

O 20.7: Vortrag

Dienstag, 24. März 2009, 12:00–12:15, SCH A216

Femtosecond Surface Plasmon Characterisation on Nanostructured Surfaces — •Jose Francisco Lopez-Barbera, Brian Ashall, Fergal O’Reilly, and Dominic Zerulla — University College Dublin, School of Physics, Dublin 4, Ireland.

Latest developments in ultrafast pulses have presented new opportunities for the investigation of surface plasmon polaritons (SPPs) on the sub 20 fs time scale. We have extended the characterization of the resonant photon-SPP coupling processes on smooth surfaces as presented in [1], emphasising the excitation, propagation, and temporal and spectral responses of the SPPs.
Broadening these studies, we have characterized the same processes using SPP excitation on metallically coated nanostructures of specific surface symmetry and tuneability. As expected, the nanostructured samples show different temporal characteristics which are attributed to their more complex propagation mechanisms. Furthermore, using our tuneable plasmonic structures [2] we present the influences of the tuneability of such systems on the temporal characteristics of the SPPs.
[1] S. E. Yalcin et al., Appl. Phys. Lett. 93, 101103 (2008).
[2] Stephanie Rehwald, Michael Berndt, Frank Katzenberg, Stephan Schwieger, Erich Runge, Klaus Schierbaum, and Dominic Zerulla, Phys. Rev. B 76, 085420 (2007).