30 May 2002 Laser hypersound spectroscopy in Si and GaAs
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We apply a transient pump-probe photo deflection technique to measure the profiles of subnanosecond sound photoexcitation. We show that the photoexcited electron-hole plasma expands with a supersonic velocity in GaAs and a subsonic velocity in Si.
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N. V. Chigarev, Dmitri Yu. Paraschuk, "Laser hypersound spectroscopy in Si and GaAs", Proc. SPIE 4749, ICONO 2001: Novel Trends in Nonlinear Laser Spectroscopy and Optical Diagnostics and Lasers in Chemistry, Biophysics, and Biomedicine, (30 May 2002); doi: 10.1117/12.468888; https://doi.org/10.1117/12.468888

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