Infrared response of chemisorbed CO to femtosecond metal substrate heating

Arjun G. Yodh, Joseph P. Culver, M. Li, L. G. Jahn, Robin M. Hochstrasser

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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 γ e=167(24) GHz, and to the bulk phonon reservoir with a rate γL=145(56) GHz. At higher excitation levels deviations from the model are observed.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsHai-Lung Dai, Steven J. Sibener
PublisherSociety of Photo-Optical Instrumentation Engineers
Pages219-224
Number of pages6
ISBN (Print)0819414182
StatePublished - Dec 1 1994
Externally publishedYes
EventLaser Techniques for Surface Science - Los Angeles, CA, USA
Duration: Jan 27 1994Jan 29 1994

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume2125
ISSN (Print)0277-786X

Conference

ConferenceLaser Techniques for Surface Science
CityLos Angeles, CA, USA
Period01/27/9401/29/94

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