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Proceedings Paper

Femtosecond time-resolved probing of desorption
Author(s): Judith A. Prybyla; Harry W.K. Tom
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Paper Abstract

The laser-induced desorption of CO molecules from a Cu(111) surface is probed with 100 fsec time-resolution. This is accomplished in a pump-probe scheme using surface second harmonic generation as the probe. We find that the desorption reaction is completed in -18 cm2) desorption is a novel one: the transient hot substrate electrons (Telectron,max approximately 3600 K, while Tlattice,max approximately 160 K) drive multiple electronic excitation-de-excitation cycles of the CO-Cu complex within the vibrational relaxation time. This vibrationally pumps the molecules into desorbing.

Paper Details

Date Published: 2 July 1993
PDF: 8 pages
Proc. SPIE 1857, Lasers and Optics for Surface Analysis, (2 July 1993); doi: 10.1117/12.148514
Show Author Affiliations
Judith A. Prybyla, AT&T Bell Labs. (United States)
Harry W.K. Tom, AT&T Bell Labs. (United States)

Published in SPIE Proceedings Vol. 1857:
Lasers and Optics for Surface Analysis
Mattanjah S. de Vries, Editor(s)

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