A recent development of ultrafast laser spectroscopy for highly light sattering materials is presented. Utilizing a stable femtosecond Ti: sapphier laser system has made it possible to get information about the dynamics of short-lived transient species in powder materials such as polymer latex perticles and organic microcrystals with a few ps temporal resolution. Time-resolved measurements of a diffuse reflected pulse with high temporal resolution are another important application of femtosecond laser technique. Its potential application toimaging and space- and time-resolved spectroscopy of the materials are described.
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