Nonlinear optical and acoustic absorption in substances with weakly bound atoms
Bonch-Bruevich V. L., Kachlishvili T. Z.
The model of a system of anharmonic oscillators should be applied to substances with weakly bound atoms (e.g., a-Si:H at a high hydrogen concentration or ferroelectrics near the phase transition). Three effects should be expected in the absorption of electromagnetic or acoustic waves in such systems. The light and sound intensities required for observing these effects are estimated.