Theory of Surface Frenkel Excitons in Cubic Systems:K_<11>-and Polarization-Dependent Oscillator Strength

概要

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Frenkel excitons localized at the surface of a cubic Bravais lattice are investi-gated theoretically in terms of a simple model. The dipole-dipole interaction isexpressed in a planewise form and it is argued that the interaction between twoplanes consists of two components, short-range and long-range interactions, eachof which is related to the Lorentz local field and the macroscopic electric field,respectively. Dyson's equation for the Green's function is solved in the wavenumber space. The surface excitons are shown to split into two levels and thecriteria for their existence are clarified. In some cases the oscillator strength ofthe surface excitons depends strongly on the polarization of the excitation light.
社団法人日本物理学会の論文
1985-08-15