Femtosecond Surface Vibrational Spectroscopy of CO Adsorbed on Ru(001) during Desorption
- 15 May 2000
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 84 (20) , 4653-4656
- https://doi.org/10.1103/physrevlett.84.4653
Abstract
Using time-resolved sum-frequency generation spectroscopy, the stretch vibration of carbon monoxide adsorbed on a single-crystal Ru(001) surface is investigated during femtosecond near-IR laser excitation leading to desorption. A large transient redshift, a broadening of the resonance, and a strong decrease in intensity are observed. These originate from coupling of the stretch to low-frequency modes, especially the frustrated rotation, that are highly excited in the desorption process.
Keywords
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