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Inward and outward integral equations and the KKR method for photons

A Moroz

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In the case of electromagnetic waves it is necessary to distinguish between inward and outward on-shell integral equations. Both kinds of equation are derived. A correct implementation of the photonic KKR method then requires the inward equations and it follows directly from them. A derivation of the KKR method from variational principles is also outlined. Rather surprisingly, the variational KKR method cannot be entirely written in terms of surface integrals unless permeabilities are piecewise constant. Both kinds of photonic KKR method use the standard structure constants of the electronic KKR method and hence allow for a direct numerical application. As a by-product, matching rules are obtained for derivatives of fields on different sides of the discontinuity of permeabilities.


PACS

63.20.-e Phonons in crystal lattices

42.70.Qs Photonic bandgap materials

Subjects

Optics, quantum optics and lasers

Condensed matter: structural, mechanical & thermal

Dates

Issue 1 (3 January 1994)



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