Novel Negative Permittivity Structure and Its Application to Excitation of Surface Plasmon in Microwave Frequency Range

Toru UNO
Takuji ARIMA

IEICE TRANSACTIONS on Communications   Vol.E93-B    No.10    pp.2629-2635
Publication Date: 2010/10/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E93.B.2629
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Advanced Technologies in Antennas and Propagation in Conjunction with Main Topics of ISAP2009)
Category: Electromagnetic Analysis
metamaterial,  negative permittivity,  surface plasmon,  finite difference time domain (FDTD) method,  

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This paper proposes a novel metamaterial structure, which equivalently indicates negative permittivity, for the purpose of applying it to a near-field imaging and/or diagnostics of electromagnetic properties by using a surface plasmon in microwave frequency range. The proposed structure consists of a conducting wire lattice with conducting spheres embedded at the mid-point of the wire. It is shown that a spatial dispersion of the wire lattice can be reduced significantly by the sphere. It is also shown that this structure can successfully be applied to an excitation of the surface plasmon in the microwave frequency range by adequately cutting into a thin slab.

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