Dresden 2011 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 19: Poster: Interfaces and Thin Films
CPP 19.17: Poster
Dienstag, 15. März 2011, 18:00–20:00, P2
Fabrication of metallic nanostructures for surface plasmon induced topography changes in azobenzene polymer films — •Arulmozhi Geetha Loganathan1, Tobias König1, 2, Jürgen Rühe1, and Svetlana Santer2 — 1Department of Microsystems Engineering (IMTEK), University of Freiburg — 2Institute for Experimental Physics, University of Potsdam
We report on the construction of photosensitive polymer films with integrated metallic gratings in the form of nano-stripes. The metallic stripes were fabricated by two photon lithography. The procedure consist of two steps: First a polymer nano-structure is generated, followed by evaporation of a metallic layer on top of the nano-pattern. Subsequently, thin photosensitive azopolymer films are deposited on top of the active metallic elements. The metallic structures act as nano-scale antennas, in which surface plasmons are excited during homogeneous irradiation with light of an appropriate wavelength. During irradiation of the surface with homogeneous UV light complex intensity patterns can be excited at the metallic interface. The size of generated intensity pattern is below the diffraction limit and can be adjusted under the influence of external stimuli such as variations of the polarization and/or wavelength of the incoming light. The distribution of surface plasmons can be predicted by using FDTD simulations and compared with experimental results. The evanescent field of the surface plasmons is used to induce topography changes in the azobenzene polymer films.