Abstract：
:Recent achievements of nonlinear acoustics concerning the realization of solitons and solitary waves in crystals and their surfaces attained by nanosecond and picosecond laser ultrasonics are discussed and compared. The corresponding pump-probe setups are described, which allow an all-optical contact-free excitation and detection of short strain pulses in the broad frequency range between 10 MHz and about 300 GHz. The formation of solitons in the propagating longitudinal strain pulses is investigated for nonlinear media with intrinsic lattice-based dispersion. The excitation of solitary surface acoustic waves is realized by a geometric film-based dispersion effect. Future developments and potential applications of nonlinear nanosecond and picosecond ultrasonics are discussed.
journal_name
Ultrasonicsjournal_title
Ultrasonicsauthors
Hess P,Lomonosov AMdoi
10.1016/j.ultras.2009.08.003subject
Has Abstractpub_date
2010-02-01 00:00:00pages
167-71issue
2eissn
0041-624Xissn
1874-9968pii
S0041-624X(09)00089-4journal_volume
50pub_type
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