Artificial magnetism and left-handed media from dielectric rings and rods

Abstract

It is shown that artificial magnetism with relatively large frequency bandwidth can beobtained from periodic arrangements of dielectric rings. Combined with dielectric rods,dielectric rings can provide 3D isotropic left-handed metamaterials which are anadvantageous alternative to metallic split ring resonators (SRRs) and/or metallicwires when undetectability by low frequency external magnetic fields is desired.Furthermore it is shown that, unlike conventional SRRs, dielectric rings can also becombined with natural plasma-like media to obtain a left-handed metamaterial.