FEL investigations of energy transfer in condensed phase systems


Journal Article

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.

Duke Authors

Cited Authors

  • Henderson, DO; Mu, R; Silberman, E; Johnson, JB; Edwards, GS

Published Date

  • December 1, 1993

Published In

Volume / Issue

  • 1854 /

Start / End Page

  • 105 - 116

International Standard Serial Number (ISSN)

  • 0277-786X

Citation Source

  • Scopus