Journal
SURFACE SCIENCE
Volume 615, Issue -, Pages 65-71Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.susc.2013.05.002
Keywords
Surface chemical reaction; Dynamics; Desorption; Carbon monoxide; Ruthenium
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Funding
- Swedish Research Council (VR)
- Knut and Alice Wallenberg Foundation, Sweden
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We studied femtosecond laser-induced desorption of CO from Ru(0001) using intense near-infrared and visible femtosecond laser pulses. We find a pronounced wavelength dependence with a factor 3-4 higher desorption yield at comparable fluence when desorption is induced via 400 nm light, compared to 800 nm and attribute this difference to the difference in penetration depth of the incident light. All our data can be described using empirical friction-modeling to determine the desorption mechanism with the same mechanism for both wavelengths. We find that both hot electrons and phonons contribute to the desorption process. (C) 2013 Elsevier B.V. All rights reserved.
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