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Proceedings Paper

Sum-frequency generation spectroscopy in the mid-infrared: K-doped C60/Ag (111) interface
Author(s): Andre Peremans; Y. Caudano; Paul Dumas; Wan Quan Zheng; A. Le Rille; Paul A. Thiry; Abderrahmane Tadjeddine
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Paper Abstract

We have developed a Sum-Frequency Generation (SFG) spectrometer allowing sensitive and highly resolved (1.8 cm-1) vibrational spectroscopy in the mid-infrared (2 - 10 micrometers ) using a dedicated picosecond optical parametric oscillator. Combining SFG and infrared absorption-reflection spectroscopy, we pinpoint the occurrence of dynamical charge transfer at the C60/Ag(111) interface. The induced strong infrared activation of the C60 Ag(2) mode (approximately 1445 cm-1) and its softening are quenched upon K-doping. This allows us to infer the coupling strength of the Ag(2) vibration to the t1u orbital of C60.

Paper Details

Date Published: 30 April 1998
PDF: 7 pages
Proc. SPIE 3272, Laser Techniques for Surface Science III, (30 April 1998); doi: 10.1117/12.307139
Show Author Affiliations
Andre Peremans, Facultes Universitaires Notre-Dame de la Paix (Belgium)
Y. Caudano, Facultes Universitaires Notre-Dame de la Paix (Belgium)
Paul Dumas, LURE/Univ. de Paris Sud (France)
Wan Quan Zheng, LURE/Univ. de Paris Sud (France)
A. Le Rille, LURE/Univ. de Paris Sud (France)
Paul A. Thiry, Facultes Universitaires Notre-Dame de la Paix (Belgium)
Abderrahmane Tadjeddine, LURE/Univ. de Paris Sud (France)

Published in SPIE Proceedings Vol. 3272:
Laser Techniques for Surface Science III
Hai-Lung Dai; Hans-Joachim Freund, Editor(s)

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