Broadband near-zero index metamaterials

K Konstantinidis, A P Feresidis

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)
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We present a new type of near-zero index (NZI) and epsilon near-zero (ENZ) metametarial with broad bandwidth characteristics. We propose an optimal geometry to manipulate the properties of the composite material and realize a metallic-dielectric NZI effective material operating at microwave frequencies with a broadband near-zero response. The effective material is composed by multiple layers of dissimilar metasurfaces of subwavelength dimensions. We demonstrate the broadband NZI metamaterial properties and study its anisotropy by realizing a radiating structure exhibiting broadband directive emission. An experimental demonstration validates the concept for an antenna in the microwave domain.
Original languageEnglish
Pages (from-to)105104
JournalJournal of Optics
Issue number10
Publication statusPublished - 23 Aug 2015


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