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We obtain theoretically the phonon-polariton spectrum in nonlinear dielectric medium with the third order Kerr-type nonlinearity and demonstrate that the appearance of new branches located in the polariton spectrum gaps. The modulation instability of new spectrum branch waves leads to the appearance of the cnoidal waves or solitons. We theoretically investigate the properties of vector and scalar...
Processes of generation, propagation and interaction of polaritons in nonlinear medium are considered. The nonlinear polarization of lattice and nonlinear internal polarization of ions under the influence of high-frequency electromagnetic field are taken into account. It is shown that the polariton spectrum depends on the intensities of electromagnetic field.
Spectra of magnetooptical polaritons in nonlinear magnetogyrotropic medium at presence of magnetostatic field are received. Nonlinear internal ion polarization arisen under the influence of high-frequency electromagnetic field is taken into account. The polariton spectra subjected to strength and direction of the external magnetostatic field are calculated.
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