Original scientific paper
Surface and bulk optical phonons and plasmons in bilayer films I. dispersion relations and the Hamiltonian formalism
Z. Lenac
; "Ruđer Bošković" Institute, P. O. B. 1016 Zagreb, Croatia, Yugoslavia
M. Šunjić
; Department of Physics, Faculty of Science, P. O. B. 162, Zagreb, Croatia, Yugoslavia and Institute of Physics of the University, P. O. B. 304, Zagreb, Croatia, Yugoslavia
Abstract
A quantum-mecanical approach to collective oscillations in bilayer films is presented in the nonretarded approximation. The dispersion relations for surface and bulk modes are found for an arbitrary dielectric function s (ω). The Hamiltonian formalism is developed for optical phonons in ionic crystals and plasmons in metals, and for inert dielectrics in contact with an ionic crystal or metal. The interaction of collective oscillations with charges is studied and the coupling functions are calculated for various thin film combinations.
Keywords
Hrčak ID:
327723
URI
Publication date:
12.1.1981.
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