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Proceedings Paper

FEL investigations of energy transfer in condensed phase systems
Author(s): Don Otto Henderson; Richard Mu; Enrique Silberman; J. Bruce Johnson; Glenn S. Edwards
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Paper Abstract

The vibrational dynamics of O-H groups in fused silica have been examined by a time- resolved pump-probe technique using the Vanderbilt Free Electron Laser (FEL). We consider two effects, local heating and transient thermal lensing, which can influence measured T1 values in one color pump-probe measurements. The dependence of these two effects on both the micropulse spacing and the total number of micropulses delivered to the sample are analyzed in detail for the O-H/SiO2 system. The results indicate that transient thermal lensing can significantly influence the measured probe signal. The local heating may cause thermally induced changes in the ground state population of the absorber, thereby complicating the analysis of the relaxation dynamics.

Paper Details

Date Published: 14 July 1993
PDF: 12 pages
Proc. SPIE 1854, Free-Electron Laser Spectroscopy in Biology, Medicine, and Materials Science, (14 July 1993); doi: 10.1117/12.148033
Show Author Affiliations
Don Otto Henderson, Fisk Univ. (United States)
Richard Mu, Fisk Univ. (United States)
Enrique Silberman, Fisk Univ. (United States)
J. Bruce Johnson, Vanderbilt Univ. (United States)
Glenn S. Edwards, Vanderbilt Univ. (United States)


Published in SPIE Proceedings Vol. 1854:
Free-Electron Laser Spectroscopy in Biology, Medicine, and Materials Science
H. Alan Schwettman, Editor(s)

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