Please use this identifier to cite or link to this item: https://doi.org/10.1103/PhysRevE.78.016605
Title: Negative refractive index of metallic cross-I-shaped pairs: Origin and evolution with pair gap width
Authors: Ma, Y.G. 
Wang, X.C.
Ong, C.K. 
Issue Date: 29-Jul-2008
Source: Ma, Y.G., Wang, X.C., Ong, C.K. (2008-07-29). Negative refractive index of metallic cross-I-shaped pairs: Origin and evolution with pair gap width. Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 78 (1) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevE.78.016605
Abstract: A structured composite of the negative index of refraction was fabricated by one layer of cross-I-shaped metal pairs. In this structure, the electric and magnetic inclusions were effectively integrated into one small unit. We varied the spacing of the cross pair to control the location of the magnetic resonance mode and their intercoupling with the electric mode. The frequency dependences of permittivity, permeability, and refractive indices with different gap widths of the pairs were systematically discussed by free-space measurement as well as numerical simulation. A spacing window dependent on the geometrical parameters was found in which the real part of the refractive index could have a negative value. The one-layer cross-pair pattern proposed in this work can be extended to three-dimensional structures with well-controlled interlayer coupling that will greatly facilitate the fabrication and measurement of negative-index materials in high frequencies. © 2008 The American Physical Society.
Source Title: Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/97309
ISSN: 15393755
DOI: 10.1103/PhysRevE.78.016605
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