Topological transition in coated wire medium. Issue 12 (21st October 2016)

• Record Type: Journal Article
• Authors: Gorlach, Maxim A.; Song, Mingzhao; Slobozhanyuk, Alexey P.; Bogdanov, Andrey A.; Belov, Pavel A.
• Is Part Of: Physica status solidi. Volume 10:Issue 12(2016)
• Page Start: 900
• Page End: 904
• Publication Date: 2016-10-21
• Subjects: metamaterials -- topological transition -- spatial dispersion -- coated wires; Solid state physics -- Periodicals; 530.4105
• DOI: 10.1002/pssr.201600289
• Languages: English
• ISSNs: 1862-6254

Abstract

Abstract : Employing nonlocal homogenization approach, we investigate the properties of a metamaterial consisting of parallel metallic wires with dielectric coating. We demonstrate that manipulation of dielectric contrast between wire dielectric shell and host material at fixed frequency results in dynamic switching of metamaterial dispersion regime from elliptic to the hyperbolic one, i.e. the topological transition takes place. It is proved that such transition can be induced by the variation of the metamaterial temperature. Our findings thus pave a way to the implementation of a tunable 'elliptic‐hyperbolic' metamaterial. Abstract : It is proved that the metamaterial composed of wires coated with the dielectric shell can be switched from elliptic dispersion regime to the hyperbolic one by changing the dielectric contrast between wire shell and host medium. Such switching results in the transition from positive refraction scenario to negative refraction case and can be achieved by varying the metamaterial temperature.