Achieving anisotropy in metamaterials made of dielectric cylindrical rods

Liang Peng; Lixin Ran; Asger Mortensen

doi:10.1063/1.3453446

Achieving anisotropy in metamaterials made of dielectric cylindrical rods

Liang Peng
, Lixin Ran
, Asger Mortensen

Zhejiang University

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Abstract

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.

Original language	English
Article number	241108
Journal	Applied Physics Letters
Volume	96
Issue number	24
ISSN	0003-6951
DOIs	https://doi.org/10.1063/1.3453446
Publication status	Published - 2010

Bibliographical note

Copyright (2010) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

Keywords

numerical analysis
metamaterials
optical constants
dispersion relations
dielectric materials
slabs

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AB - 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.

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KW - optical constants

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Achieving anisotropy in metamaterials made of dielectric cylindrical rods

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