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Proceedings Paper

Infrared response of chemisorbed CO to femtosecond metal substrate heating
Author(s): Arjun G. Yodh; Joseph P. Culver; M. Li; L. G. Jahn; Robin M. Hochstrasser
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Paper Abstract

Time resolved IR spectroscopy is used to monitor the stretch mode of CO on Cu(111) following femtosecond visible excitation. A time dependent shift in the stretch mode complex frequency is observed and is attributed to low frequency adsorbate-like modes becoming excited via coupling to substrate electrons and phonons. At low levels of excitation it is found that the frustrated translation is coupling to the bulk electron reservoir with a rate (gamma) eequals167(24) GHz, and to the bulk phonon reservoir with a rate (gamma) Lequals145(56) GHz. At higher excitation levels deviations from the model are observed.

Paper Details

Date Published: 21 July 1994
PDF: 6 pages
Proc. SPIE 2125, Laser Techniques for Surface Science, (21 July 1994); doi: 10.1117/12.180849
Show Author Affiliations
Arjun G. Yodh, Univ. of Pennsylvania (United States)
Joseph P. Culver, Univ. of Pennsylvania (United States)
M. Li, Univ. of Pennsylvania (United States)
L. G. Jahn, Univ. of Pennsylvania (United States)
Robin M. Hochstrasser, Univ. of Pennsylvania (United States)

Published in SPIE Proceedings Vol. 2125:
Laser Techniques for Surface Science
Hai-Lung Dai; Steven J. Sibener, Editor(s)

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