Résumé
We demonstrate the ability of doubly resonant sum'frequency generation (DR-SFG) to investigate electron'phonon couplings at C60'metal interfaces. Due to its coupling to electronic transitions, the totally symmetric Ag(2) vibration of C60 exhibits a huge enhancement of its nonlinear response for sum'frequency energies above the molecular electronic gap. We attribute this resonance to the coupling of the pentagonal pinch mode with the t1u lowest unoccupied molecular orbital (LUMO) of C60.
langue originale | Anglais |
---|---|
Pages (de - à) | 139-147 |
Nombre de pages | 9 |
journal | Journal of Electron Spectroscopy and Related Phenomena |
Volume | 129 |
Numéro de publication | 2-3 |
Etat de la publication | Publié - 2003 |