Negative refractive index induced by percolation in disordered metamaterials
Optics
2017-03-09 v2
Abstract
An effective medium model is developed for disordered metamaterials containing a spatially random distribution of dielectric spheres. Similar to effective medium models for ordered metamaterials, this model predicts resonances in the effective permeability and permittivity arising from electric- and magnetic-dipole Mie resonances in the spheres. In addition, the model predicts a redshift of the electric resonance with increasing particle loading. Interestingly, when the particle loading exceeds the percolation threshold of 33\%, the model predicts that the electric resonance overlaps with the magnetic resonance, resulting in a negative refractive index.
Cite
@article{arxiv.1610.08704,
title = {Negative refractive index induced by percolation in disordered metamaterials},
author = {Brian A Slovick},
journal= {arXiv preprint arXiv:1610.08704},
year = {2017}
}