FIRST-ORDER SPATIAL-DISPERSION AND MAXWELL-GARNETT-MODELING OF BIANISOTROPIC MEDIA

A recently-developed theory determines the material parameters of bian isotropic composite media formed By inclusions embedded into the diele ctric matrix by application of the Maxwell Garnett approach when the r esponse of the individual inclusion upon the external (local) field is assumed to be known. In this theory, the electromagnetic dipole model of the inclusions mast be considers, Such a model can be non-invarian t with respect to the choice of coordinate origin in Ease of bianisotr opic inclusions that have both induced magnetodipole and electroquadru pole moments. In this paper we discuss the constitutive relations obta ined in the framework of first-order spatial dispersion approximation, and se express material parameters by those of an individual particle , taking into account the induced quadrupoles. The Maxwell Garnett for malism approach is applied.