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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