Regensburg 2013 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 12: Poster: Nanoparticles and Composite Materials
CPP 12.18: Poster
Montag, 11. März 2013, 17:30–19:30, Poster C
Spectroscopic Ellipsometry of Anisotropic Nanocomposites — •Johannes F. H. Risch1, Bastian Besner2, Maryam Hashemi2, Matthias Schwartzkopf1, Adeline Buffet1, Berit Heidmann1, Gerd Herzog1, Volker Körstgens3, Ezzeldin Metwalli3, Jan Perlich1, Andre Rothkirch1, Monika Rawolle3, Kai Schlage1, Peter Müller-Buschbaum3, Ralf Röhlsberger1, Rainer Gehrke1, Michael A. Rübhausen2, and Stephan V. Roth1 — 1DESY, Hamburg, Germany — 2Uni. Hamburg, Institut für Angewandte Physik, Hamburg, Germany — 3TU München, Physik Department E13, Garching, Germany
Optical anisotropic thin films have a wide field of application like antenna, sensors or LEDs. Vacuum sputter deposition, which is commonly used in industry has to be proven a reliable method for preparing thin films. Glancing angle deposition (GLAD) [1] of gold on top of a colloidal array of polystyrene nanospheres was used to create anisotropic optical properties in nanocomposite thin films. Using spectroscopic ellipsometry, we investigated the change of optical properties caused by asymmetric deposition of gold clusters. Since commercial standard software does not enclose applicable fitting models, a new analyzing software is developed fulfilling the complex demands to model anisotropic media. In order to to extract the optical response of each active layer, a systematic sample analysis comprising the measurements of single components of challenging GLAD samples was performed. As a result, an energy depending change of azimuthal symmetry is observed. [1] Gonzalez-Garcia et al., ChemPhysChem 11, 2005 (2010)