Open AccessNegative Refractive Index in Nanoparticles Layer at the Visible
Author(s) -
Hussein M. Ali,
Guoping Zhang
Publication year - 2019
Publication title -
applied science and innovative research
Language(s) - English
Resource type - Journals
eISSN - 2474-4980
pISSN - 2474-4972
DOI - 10.22158/asir.v3n2p79
Subject(s) - refractive index , materials science , permittivity , metamaterial , finite difference time domain method , optics , resonator , split ring resonator , optoelectronics , dielectric , physics
Metamaterial structure based on epoxy resin nanoparticles positioned on mica glass substrate is proposed in order to produce negative refractive index. Complex reflection and transmission coefficients (S-parameters) are computed using CST MWS, based on finite integration technique (FIT) which is equivalent to FDTD when applied to Cartesian grids in the time domain. Effective refractive index, effective permittivity and effective permeability were extracted from the simulated S-parameters by using CST MWS extraction method which is done by using template pots-processing features. The real part of the refractive index is found to be negative at wavelengths where both real parts of the permittivity and permeability are negatives without using split ring resonators and thin wires.