The second-harmonic generation of leaky waves at the interface between glass and iron has been investigated. Fundamental frequency interface waves are excited by bulk shear waves, incident at the critical angle, and the generated second-harmonic surface waves are detected by reradiated bulk shear waves. The amplitudes of the generated second harmonic obey the square law. The second-harmonic generation decreases sharply as the incident and detection drive deviate from the critical angle.
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Mao et al. (1989) studied this question.
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