The split cube in a cage: bulk negative-index material for infrared applications
A Andryieuski, C Menzel, C Rockstuhl, R Malureanu, A V Lavrinenko
JOURNAL OF OPTICS A
Volume: 11, Issue: 11, Sept. 2009
negative-index material, bulk metamaterial, 3D metamaterial, effective homogeneity
We propose the split cube in a cage (SCiC) design for application in producing a bulk metamaterial. Applying realistic material data for thin silver films, we observe an immediate convergence of the effective parameters obtained with a number of layers towards the bulk properties. Results are obtained by two different numerical techniques: the Fourier modal method and the finite integrals method, thus ensuring their validity. The SCiC exhibits a refractive index of -0.6 for frequencies close to the telecommunication bands. The fast convergence of effective parameters allows consideration of the SCiC as a bulk (effectively homogeneous) negative-index metamaterial even for a single layer. The bulk-like nature together with the cubic symmetry of the unit cell make the SCiC a promising candidate for potential applications at telecommunication frequencies.
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