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.
Aydin, K., Cakmak, A.o., Sahin, L., Li, Z., Bilotti, F., Vegni, L., et al. (2009). Split-ring-resonator-coupled enhanced transmission through a single subwavelength aperture. PHYSICAL REVIEW LETTERS, 102, 013904-1-013904-4 [10.1103/PhysRevLett.102.013904].
Split-ring-resonator-coupled enhanced transmission through a single subwavelength aperture
BILOTTI, FILIBERTO;
2009-01-01
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
