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Fourth International Conference on Electrical Transport and Optical Properties of Inhomogeneous Media (ETOPIM 4), St Petersburg / Moscow : Russie, Fédération De (1996)
Momentum-dependent electromagnetic T-matrix and dynamic effective properties of random media
Yves-Patrick Pellegrini 1, Pascal Thibaudeau 2, Brian Stout 3
(1997-07-01)

We discuss the problem of the dynamic dielectric and magnetic response on the whole frequency range of a composite material. We derive exact one-body expressions of the momentum-dependent mean constitutive kernels, for an assembly of dielectric and magnetic spheres of finite size, on the basis of their T-matrix. The effective homogeneous-like constitutive constants are defined, and used in a Coherent Potential Approximation. In a second step, we solve the dispersion relation in order to extract observable quantities.
1:  DAM Île-de-France (DAM/DIF)
CEA : DAM/DIF
2:  CEA - Direction des Applications Militaires - Le Ripault
CEA
3:  Institut FRESNEL (IF)
CNRS : UMR6133 – Université de Provence - Aix-Marseille I – Université Paul Cézanne - Aix-Marseille III – Ecole Centrale de Marseille
Physics/Condensed Matter/Materials Science
Random media: dielectric – magnetic – effective medium – spatial dispersion – multiple scattering – T-matrix – spheres