Dispersion of Localized Mode Polaritons in K3Cu(CN)4

نویسنده

Wilhelm Nitsch

چکیده

The dispersion of polaritons of symmetry Aj and E is investigated in the region of four isotopic vibrations originating from C13and N15-atoms in their natural abundances. The measured dispersion curves are explained in terms of a theory for localized mode polaritons (LMP) developed by Ohtaka. The dispersion relation is generalized for a polyatomic crystal and applied to K3Cu(CN)4 . The comparison of experimental data with calculated dispersion curves shows a quite satisfying agreement for a certain value of the coupling constant which is approximately the same for E-type and Artype polaritons.

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