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Berlin 2005 – scientific programme

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DS: Dünne Schichten

DS 24: Postersitzung II

DS 24.7: Poster

Tuesday, March 8, 2005, 17:00–19:00, Poster TU B

Optical anisotropy of clean and adsorbate modified vicinal Si(001) surfaces — •Regina Paßmann1,2, Matthias Wahl1,2, Michael Gensch1,3, Karsten Hinrichs1, Patrick Vogt2, Wolf Gero Schmidt4, Wolfgang Richter2, and Norbert Esser11ISAS - Institute for Analytical Sciences - Department Berlin, Albert-Einstein-Str. 9, D-12489 Berlin — 2TU Berlin, Institut für Festkörperphysik, Hardenbergstr. 36, D-10623 Berlin — 3Gesellschaft zur Förderung angewandter Optik, Optoelektronik, Quantenelektronik und Spektroskopie e.V., Rudower Chaussee 29, D-12489 Berlin — 4Friedrich-Schiller-Universität Jena, Institut für Festkörperphysik und -optik, Max-Wien-Platz 1, D-07743 Jena

Reflectance anisotropy spectroscopy (RAS) is well suited to investigate the anisotropy of optical and electronical properties of solid surfaces. In agreement with ab-initio calculations the geometric and electronic structure of the surface can be determined. The optical anisotropy of the clean vicinal Si(001) surface and the modification in the optical anisotropy during adsorption of organic molecules was investigated. A model of the adsorption geometry for cyclopentene monolayers on the vicinal Si(001) surface could be verified. The sample was prepared under ultra high vacuum and characterised by RAS, XPS and LEED. Comparison with ab-initio calculation shows that cyclopentene most probably adsorbs via a cycloaddition reaction with the Si dimer [1].

[1] W.G. Schmidt, F. Fuchs, A. Hermann, K. Seino, F. Bechstedt, R. Paßmann, M. Wahl, M. Gensch, K. Hinrichs, N. Esser, S. Wang, W. Lu, J. Bernholc, J. Phys. C 16 (2004), S4323

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