Split-ring-resonator-coupled enhanced transmission through a single subwavelength aperture

Date
2009
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Source Title
Physical Review Letters
Print ISSN
0031-9007
Electronic ISSN
1079-7114
Publisher
American Physical Society
Volume
102
Issue
1
Pages
013904-4 - 013904-1
Language
English
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Abstract

We report the enhanced transmission of electromagnetic waves through a single subwavelength aperture by using a split-ring resonator (SRR) at microwave frequencies. By placing a single SRR at the near field of the aperture, strongly localized electromagnetic fields are effectively coupled to the aperture with a radius that is 20 times smaller than the resonance wavelength (r/λ=0.05). We obtained 740-fold transmission enhancement by exciting the electric resonance of SRR. A different coupling mechanism, through the magnetic resonance of SRR, is also verified to lead to enhanced transmission.

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Published Version (Please cite this version)