Abstract
We describe a means to achieve time reversal acoustics on nanosecond or picosecond time scales for surface or bulk longitudinal phonon modes, respectively, by the use of ultrashort optical pulses for the phonon generation. After the presentation of the theory of low and high frequency time reversal acoustics, the limitations of the method and possible experiments on nanostructures and microstructures are discussed. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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