Journal
IEEE PHOTONICS JOURNAL
Volume 5, Issue 2, Pages -Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JPHOT.2013.2259583
Keywords
Chiral media; metamaterials
Funding
- National Science Council, Taiwan [NSC 100-2221-E-007-080-MY2, NSC 100-2120-M-007-013]
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Metallic helix metamaterial has been demonstrated to show strong circular dichroism and is promising for photonic applications such as broadband circular polarizers. In this paper, we present the analysis on the resonances of gold helix metamaterials by dipolar interactions and hybridization and discuss the origin of the broadband feature. Coupling effects among induced dipoles in the helices are examined by the current and field distributions of a single-helix metamaterial. Such analysis is also applied to explain the geometry-dependent resonance of a double-helix metamaterial, and optical properties are discussed. Our analysis provides a physical understanding of the resonant behaviors that can guide the design of metallic helix metamaterials and manipulate their resonant properties.
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