DYNAMICS OF ACOUSTOELECTROMAGNETIC SOLITONS AS A MANIFESTATION OF HIGHER NONLINEARITY

The acoustoelectromagnetic interaction is examined in a regime where t hree mechanisms must be taken into account simultaneously: photoelasti city, quadratic photoelasticity, and elastic nonlinearity. It is shown that beyond the critical conditions, acoustic solitary waves are form ed at harmonic and subharmonic frequencies in a crystal. Including dam ping and nonideal reflection at the boundaries does not lead to the es tablishment of any sort of stationary state: a soliton spatial-tempora l dynamic develops. (C) 1997 American Institute of Physics.