Enhanced transmission through a subwavelength aperture using metamaterials

Creators: Cakmak, Atilla Ozgur; Aydin, Koray; Colak, Evrim; Li, Zhaofeng; Bilotti, Filiberto; Vegni, Lucio; Ozbay, Ekmel

Abstract

We report an enhanced transmission through a single circular subwavelength aperture that is incorporated with a split ring resonator (SRR) at the microwave regime. Transmission enhancement factors as high as 530 were observed in the experiments when the SRR was located in front of the aperture in order to efficiently couple the electric field component of the incident electromagnetic wave at SRR's electrical resonance frequency. The experimental results were supported by numerical analyses. The physical origin of the transmission enhancement phenomenon was discussed by examining the induced surface currents on the structures.

Additional Information

©2009 American Institute of Physics. Received 18 February 2009; accepted 15 July 2009; published 4 August 2009.This work is supported by the European Union under the projects EU-PHOME, and EU-ECONAM, and TUBITAK under Project Nos. 105A005, 106E198, and 107A004. One of the authors E.O. also acknowledges partial support from the Turkish Academy of Sciences. PACS: 84.40.Az Waveguides, transmission lines, striplines 41.20.Jb Electromagnetic wave propagation; radiowave propagation

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