Abstract

It is shown that the phenomenon of self-induced transparency can occur when a coherently excited propagating phonon mode has a frequency that is equal to the difference between the frequencies of two flat phonon branches. The nonlinear coupling is due to cubic anharmonicity. Using a quantum kinetic-type approach, the Maxwell-Bloch equations are derived for such systems. Including third-order correlations in this approach, the intrinsic damping of parametrically excited two-phonon oscillations is investigated, that lead to phonon squeezing. In addition, we analyze the resonant interaction of a coherently driven phonon mode with one flat branch of the phonon dispersion relation.

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