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DS: Dünne Schichten

DS 24: Postersitzung II

DS 24.20: Poster

Dienstag, 8. März 2005, 17:00–19:00, Poster TU B

Reflectance anisotropy spectroscopy extended into the IR and VUV spectral range — •Matthias Wahl^1,2, Karsten Fleischer¹, Sandhya Chandola¹, Norbert Esser², and Wolfgang Richter¹ — ¹Technische Universität Berlin, IFP, Sekr. PN 6-1 Hardenbergstr. 36, 10623 Berlin — ²Institute for Analytical Science, Department Berlin, Albert-Einstein Str. 9, 12489 Berlin

Reflectance anisotropy spectroscopy (RAS) is often used as tool to monitor anisotropic surface structures. With good understanding of these also molecular assemblies on surfaces are more and more analysed with RAS. Usual set-ups only operate in the visible spectral range (1.5 - 6 eV). We present new RAS systems which are extended into the infrared and also into the VUV regime to an effective range of (0.5-9 eV). Possible origins of RAS signatures are discussed, particularly a free electron like response from one dimensional metallic structures in the IR and also signatures arising from molecular adsorbates in the UV range.