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

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

2008-05-26

arxiv.org/abs/0805.3907v1

Physics

Optics

14 pages, 4 figures, to be submitted to PRL

Scientific paper

10.1103/PhysRevLett.102.013904

We report the enhanced transmission of electromagnetic waves through a single subwavelength aperture by making use of the resonance behavior of 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 twenty times smaller than the resonance wavelength. 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 yield enhanced transmission. Good agreement is obtained between the microwave measurements and numerical simulations.

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