We propose a generic conceptual idea to obtain bulk 3D negative index metamaterials, which exhibit isotropic properties. The design is based on the nested structures approach, when one element providing magnetic response is inserted into another design with negative dielectric constant. Both constitutive elements possess cubic symmetry, thus we preserve it for the whole unit cell. The concept can be applied for any frequencies; however, we are targeting optical and THz ranges. We report on numerical characterization of two particular designs, called as “split-cube-in-cage” and “split-cube-in-carcass”, revealing negative index behaviour. Two approaches are applied – effective parameters approximation and phenomenological one, showing excellent correlation in results. The designs show good results in isotropy of effective properties and their convergence with the thickness of a sample. Apart from design and numerical analysis progress in vertical layers metal deposition is also addressed in the presentation.
Proceedings, Icton, 2009
Main Research Area:
11th International Conference on Transparent Optical Networks, 2009