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Trains of ultrashort acoustic solitons
Author(s) -
Muskens Otto L.,
Dijkhuis Jaap I.
Publication year - 2004
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200405411
Subject(s) - soliton , train , brillouin zone , brillouin scattering , amplitude , physics , transducer , optics , materials science , acoustics , nonlinear system , laser , quantum mechanics , cartography , geography
We present results on soliton trains in a PbMoO 4 crystal, and show that a wide range of soliton train parameters is accessible using different transducer materials. Brillouin spectra are presented probing the development of high‐amplitude bipolar strain pulses into soliton trains during propagation in PbMoO 4 at liquid helium temperatures. A simple interpretation of the beating patterns in the Brillouin scattering yields the highest relative soliton velocities in the trains of up to 0.3%. We use this to predict a value for the third‐order elastic constant of PbMoO 4 of C 333 = –480 GPa. The extremely fast solitons predict participation of the entire LA phonon branch in the soliton formation. For a gold transducer, the solitons are much wider but their number in the train is even larger. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)