Confined longitudinal acoustic phonon modes in free-standing Si membranes coherently excited by femtosecond laser pulses

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Hudert, Florian ; Bruchhausen, Axel ; Issenmann, Daniel ; Schecker, Olivier ; Waitz, Reimar ; Erbe, Artur ; Scheer, Elke ; Dekorsy, Thomas ; Mlayah, Adnen ; Huntzinger, Jean-Roch (2009)

In this Rapid Communication we report the first time-resolved measurements of confined acoustic phonon modes in free-standing Si membranes excited by fs laser pulses. Pump-probe experiments using asynchronous optical sampling reveal the impulsive excitation of discrete ... View more
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