Refractive Index And Propagation Of Light In Nan Ellipsoidal Metal And Dielectric Composite

Abstract

Refractive index and propagation of electromagnetic pulses are studied analytically and numerically in a medium with nanoellipsoidal metal/dielectric composites. The cases when all nanoellipsoidal inclusions are aligned to the direction of the incident field and when they are randomly distributed are considered for pure metal type and confocal metallic shell and dielectric core type inclusions embedded in a passive host medium. Based on long wave approximation and the effective dielectric response of the medium the effects of geometrical factor, filling factor and orientation of the inclusions on the refractive index and group velocity are described analytically and computationally.