Funk, S. ; Bonn, M. ; Denzler, D. N. ; Hess, Ch. ; Wolf, M. ; Ertl, G. (2000)
Desorption of CO from Ru(001) induced by near-infrared femtosecond laser pulses.
In: Journal of Chemical Physics, 112 (22)
Article, Bibliographie
This is the latest version of this item.
Abstract
Irradiation of a Ru(001) surface covered with CO using intense femtosecond laser pulses (800 nm, 130 fs) leads to desorption of CO with a nonlinear dependence of the yield on the absorbed fluence (100–380 J/m²). Two-pulse correlation measurements reveal a response time of 20 ps (FWHM). The lack of an isotope effect together with the strong rise of the phonon temperature (2500 K) and the specific electronic structure of the adsorbate–substrate system strongly indicate that coupling to phonons is dominant. The experimental findings can be well reproduced within a friction-coupled heat bath model. Yet, pronounced dynamical cooling in desorption, found in the fluence-dependence of the translational energy, and in a non-Arrhenius behavior of the desorption probability reflect pronounced deviations from thermal equilibrium during desorption taking place on such a short time scale.
| Item Type: | Article |
|---|---|
| Erschienen: | 2000 |
| Creators: | Funk, S. ; Bonn, M. ; Denzler, D. N. ; Hess, Ch. ; Wolf, M. ; Ertl, G. |
| Type of entry: | Bibliographie |
| Title: | Desorption of CO from Ru(001) induced by near-infrared femtosecond laser pulses |
| Language: | English |
| Date: | 8 June 2000 |
| Place of Publication: | Melville, NY |
| Publisher: | AIP Publishing |
| Journal or Publication Title: | Journal of Chemical Physics |
| Volume of the journal: | 112 |
| Issue Number: | 22 |
| URL / URN: | http://dx.doi.org/10.1063/1.481626 |
| Corresponding Links: | |
| Abstract: | Irradiation of a Ru(001) surface covered with CO using intense femtosecond laser pulses (800 nm, 130 fs) leads to desorption of CO with a nonlinear dependence of the yield on the absorbed fluence (100–380 J/m²). Two-pulse correlation measurements reveal a response time of 20 ps (FWHM). The lack of an isotope effect together with the strong rise of the phonon temperature (2500 K) and the specific electronic structure of the adsorbate–substrate system strongly indicate that coupling to phonons is dominant. The experimental findings can be well reproduced within a friction-coupled heat bath model. Yet, pronounced dynamical cooling in desorption, found in the fluence-dependence of the translational energy, and in a non-Arrhenius behavior of the desorption probability reflect pronounced deviations from thermal equilibrium during desorption taking place on such a short time scale. |
| Date Deposited: | 26 Jul 2010 14:01 |
| Last Modified: | 24 Apr 2024 14:29 |
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Desorption of CO from Ru(001) induced by near-infrared femtosecond laser pulses. (deposited 23 Apr 2024 08:30)
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