Open AccessInternal homogenization: Effective permittivity of a coated sphere
Author(s) -
Uday K. Chettiar,
Nader Engheta
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.022976
Subject(s) - homogenization (climate) , permittivity , materials science , dielectric , optics , spheres , relative permittivity , composite material , physics , optoelectronics , biodiversity , ecology , astronomy , biology
The concept of internal homogenization is introduced as a complementary approach to the conventional homogenization schemes, which could be termed as external homogenization. The theory for the internal homogenization of the permittivity of subwavelength coated spheres is presented. The effective permittivity derived from the internal homogenization of coreshells is discussed for plasmonic and dielectric constituent materials. The effective model provided by the homogenization is a useful design tool in constructing coated particles with desired resonant properties.