The effects of wave front reversal and inversion of the time profile are observed experimentally for a dipolar spin wave pulse (carrier frequency ω₁) interacting in a yttrium-iron garnet film with a weakly localized nonstationary parametric pumping (carrier frequency ωₚ0ex0ex2ω₁) in a three-wave process with conservation law ωₚ0ex0ex=0ex0exω₁+ω₂, where ω₂ is the carrier frequency of the reversed pulse. Theoretical analysis based on the solution of the system of equations for envelopes of interacting wave packets by means of a Green's function formalism gives a quantitative description of the observed phenomena.
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Melkov et al. (2000) studied this question.
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