Achieving anisotropy in metamaterials made of dielectric cylindrical rods

作者：Peng L^*; Ran Lixin; Mortensen N A

来源：Applied Physics Letters, 2010, 96(24): 241108.

DOI：10.1063/1.3453446

• dielectric materials
• dispersion relations
• metamaterials
• numerical analysis
• optical constants
• slabs

We show that anisotropic negative effective dispersion relation can be achieved in pure dielectric rod-type metamaterials by turning from the symmetry of a square lattice to that of a rectangular one. Theoretical predictions and conclusions are verified by both numerical calculations and computer based simulations. The proposed anisotropic metamaterial, is used to construct a refocusing slab lens and a subdiffraction hyperlens. The all-dielectric origin makes it more straightforward to address loss and scaling, thus facilitating future applications in both the terahertz and optical range.

• 出版日期2010-6-14
• 单位浙江大学