CLUSTERING EFFECTS IN COMPOSITE OPTICAL-MATERIALS

The influence of clustering effects on the susceptibility of composed materials is considered by means of a generalized method of integral e quations in the case of a two component medium. For the first time the discrete character of the impurities and of the host medium are both taken into account. We have shown that the clustering of the impuritie s influences the susceptibility of the composite material in all mixtu res except for the case when the host medium is a vacuum. The develope d approach may be applied to artificial magnetic materials and to phot onic band-gap structures in the long wavelength Limit.