Berlin 2005 – scientific programme
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CPP: Chemische Physik und Polymerphysik
CPP 27: Nano tubes and fibres
CPP 27.2: Talk
Tuesday, March 8, 2005, 14:15–14:30, TU C243
Raman cross section of single-walled carbon nanotubes — •Janina Maultzsch1, María Machón1, Stephanie Reich2, Hagen Telg1, and Christian Thomsen1 — 1Institut für Festkörperphysik, Technische Universität Berlin — 2Departement of Engineering, University of Cambridge, UK
We determine the absolute Raman cross section of single-walled carbon nanotubes both experimentally and by ab-initio calculations. Normalizing the measured Raman intensity to the second-order Si signal, we found for the radial breathing mode of an individual tube dS/dΩ=1.1 m−1sr−1. The theoretical value obtained from ab-initio calculations is by only one order of magnitude smaller. We discuss these results with respect to single and double-resonant Raman scattering. The relative Raman intensity for different tube structures agrees very well with the systematic dependencies predicted by theory.