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Electromagnetic wave destruction due to photon-phonon interaction (polariton) in the negative dielectric band of crystal has been studied in our work. General case without low damping approximation is considered. Modeling results are obtained in analytical form based on single oscillator model. Phonon damping effects are analyzed using the new common technique of the phase portraits both for complex...
The physical conditions analysis for the appearance of negative values of the dielectric function (DF) within the T-L splitting frequency interval in polar crystals is presented. The simple quantitative criterion for existence of negative DF band is derived in the three equivalent forms as a proper combination of basic parameters of a single phonon vibration. Principal significance of the phonon damping...
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