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Study of acoustic phonon propagation by femtosecond ellipsometry

Shirly Espinoza, Yael Gutiérrez, Sébastien Cueff, Krishna P. Khakurel, Saul Vazquez- Miranda, Martin Zahradník, Mateusz Rebarz, and Jakob Andreasson

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Abstract

Acoustic phonons are generated by the arrival of a femtosecond laser pulse to the surface of a material. By femtosecond pump-probe ellipsometry on thin films and bulk materials, we could discern between different types of transient phenomena including the ones due to the propagation of these photo-induced acoustic waves.

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