Regensburg 2010 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 59: Poster Session II (Nanostructures at surfaces: Dots, particles, clusters; Nanostructures at surfaces: arrays; Nanostructures at surfaces: Wires, tubes; Nanostructures at surfaces: Other; Plasmonics and nanooptics; Metal substrates: Epitaxy and growth; Metal substrates: Solid-liquid interfaces; Metal substrates: Adsoprtion of organic / bio molecules; Metal substrates: Adsoprtion of inorganic molecules; Metal substrates: Adsoprtion of O and/or H; Metal substrates: Clean surfaces; Density functional theory and beyond for real materials)

O 59.50: Poster

Mittwoch, 24. März 2010, 17:45–20:30, Poster B1

Lateral manipulation of surface plasmons by hollow structures — •Michael Lutz, Stephen Riedel, Paul Leiderer, and Johannes Boneberg — Universität Konstanz

A frequency doubled Nd:YAG pulse (10ns,532nm) is splitted into three beams of equal intensity. The beams are recombined on a thin gold-film under specific angles which define the periodicity of the resulting interference pattern. We observe the formation of hollow structures with diameters between few microns and few hundred nanometers.

The structures originate from thermal expansion upon melting of the surface which occurs only in regions of high intensity. This generates a shift of the centre of mass off the surface. The motion of the centre of mass causes the liquid lamella to lift off. After resolidification a nanostructured surface with hollow bumps has formed.

We show how these structures can be used to manipulate surface plasmons laterally.