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Nonradiating and radiating configurations driven by left-handed metamaterials

Boardman, AD and Marinov, K 2006, 'Nonradiating and radiating configurations driven by left-handed metamaterials' , Journal of the Optical Society of America B: Optical Physics (JOSA B), 23 (3) , pp. 543-552.

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Abstract

It is shown that a pair of identical emitters (e.g., wire dipole antennas) in the focal points of a disk, made of left-handed metamaterial (a perfect lens), forms a nonradiating electromagnetic configuration. The emitters are fed with voltages of equal magnitude and pi out of phase. Detailed finite-difference time-domain modeling shows that nonpropagating electromagnetic fields are generated—fields that remain confined within the region between the emitters and the lens. The energy balance of the system shows that the radiation resistance of the system is low. This means that the input power is converted into heat in the volume of the lens, and only a small fraction of it is radiated. The system performance shows that disturbing the configuration of the nonpropagating electromagnetic fields with the presence of an externally introduced object stimulates radiation. This suggests possible detector applications. In-phase feeding voltages are also studied with the consequence that the radiation resistance of the antennas is increased.

Item Type: Article
Uncontrolled Keywords: Microwaves, waves
Themes: Subjects / Themes > Q Science > QC Physics
Subjects outside of the University Themes
Schools: Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering > Materials & Physics Research Centre
Colleges and Schools > College of Science & Technology
Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering
Journal or Publication Title: Journal of the Optical Society of America B: Optical Physics (JOSA B)
Publisher: Optical Society of America
Refereed: Yes
ISSN: 07403224
Depositing User: H Kenna
Date Deposited: 23 Aug 2007 11:55
Last Modified: 20 Aug 2013 16:47
URI: http://usir.salford.ac.uk/id/eprint/334

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