Presentations

    Ultrafast Frequency Dynamics of Coherent Phonons in Te Under High Density Photoexcitation, at Photonics West 2006 (San Jose, CA), Wednesday, January 25, 2006:
    We report on the ultrafast dynamics of large amplitude A1 coherent optical phonons in Te after excitation with femtosecond laser pulses. Using time-resolved pump-probe dielectric tensor measurements on a single crystal Te sample we can monitor the excitation of the A1 phonon mode due to photoexcited carrier density redistribution. By performing a short-term Fourier transform of the observed dielectric tensor oscillations we can track the evolution of their local frequency and determine the time-resolved frequency response of the photoexcited A1 phonon mode.

    The purpose of the experiment...

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