Hamburg 2001 – wissenschaftliches Programm

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O: Oberflächenphysik

O 25: Postersitzung (Grenzfl
äche fest-flüssig, Methodisches, Nanostrukturen, Organische Dünnschichten, Rastersondentechniken, reine Oberfl
ächen, Teilchen und Cluster, Zeitaufgelöste Spektroskopie, Sonstiges)

O 25.59: Poster

Mittwoch, 28. März 2001, 15:00–18:00, Foyer zu B

Plasmon enhanced Brillouin scattering from lithographically designed line structures — •Reinhold Eberle and Martin Pietralla — Albert-Einstein-Allee 11, Universität Ulm, 89081 Ulm

Line structures in the range from 4 µm down to 500 nm line width were investigated with plasmon resonance and Brillouin spectroscopy. The structures were produced by spincaoting a standard PMMA resist on a thin silver layer. The line structure was written using electron beam lithography.
The structures show several plasmon resonances depending on the incident angle and the propagation direction with respect to the lines.
Some of these resonances were used for Brillouin scattering. These Brillouin spectra also show different features:
Above 2 µm and parallel to the lines there is a single Rayleigh wave like in the case of a pure silver surface. Perpendicular to the lines one can see several peaks. These peaks are assigned to different dispersion branches and discussed in the repeated zone scheme.