Abstract
Femtosecond laser excitation of α-quartz launches coherent optical phonons modulating the refractive index of the sample. The observed oscillations in the transmission and ellipticity of probe light decays due to phonon-phonon scattering. With decreasing temperature, the vibrations shift towards higher energies and are accompanied by a rise of the phonon lifetime caused by lattice stiffening and freezing of phonon modes, respectively.
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von Volkmann, K., Kampfrath, T., Krenz, M., Wolf, M., Frischkorn, C. (2009). Ultrafast dynamics of coherent optical phonons in α-quartz. In: Corkum, P., Silvestri, S., Nelson, K., Riedle, E., Schoenlein, R. (eds) Ultrafast Phenomena XVI. Springer Series in Chemical Physics, vol 92. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-95946-5_76
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DOI: https://doi.org/10.1007/978-3-540-95946-5_76
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