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.
Original language | English (US) |
---|---|
Article number | 013904 |
Journal | Physical review letters |
Volume | 102 |
Issue number | 1 |
DOIs | |
State | Published - Jan 5 2009 |
ASJC Scopus subject areas
- General Physics and Astronomy