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Optica Publishing Group
  • Quantum Electronics and Laser Science Conference
  • OSA Technical Digest (Optica Publishing Group, 1993),
  • paper QWA3

Ultrafast transient infrared absorption measurements of surface-to-adsorbate energy transfer: electronic versus phonon effects

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Abstract

The increased understanding of ultrafast heating effects that has emerged from studies of clean metallic and semiconductor substrates has stimulated considerable activity in the area of laser-driven processes in adsorbate layers.1 For adsorbate systems the issue of the time scale of excited-state damping arises, as does the nature of the coupling between the adsorbate and laser- induced excitations in the substrate. The results described here constitute, to our knowledge, the first measurements of times for the coupling of low-frequency adsorbate modes tohot lattice electrons and photons.

© 1993 Optical Society of America

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