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DS: Dünne Schichten
DS 24: Postersitzung II
DS 24.20: Poster
Tuesday, March 8, 2005, 17:00–19:00, Poster TU B
Reflectance anisotropy spectroscopy extended into the IR and VUV spectral range — •Matthias Wahl1,2, 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.