CST – Computer Simulation Technology

Transmission enhancement through deep subwavelength apertures using connected split ring resonators

Title:
Transmission enhancement through deep subwavelength apertures using connected split ring resonators
Author(s):
Damla Ates, Atilla Ozgur Cakmak, Evrim Colak, Rongkuo Zhao C. M. Soukoulis, Ekmel Ozbay
Source:
OPTICS EXPRESS
Vol./Issue/Date:
Volume: 18, Issue: 44, 15 February 2010
Year:
2010
Page(s):
3952-3966
Abstract:
We report astonishingly high transmission enhancement factors through a subwavelength aperture at microwave frequencies by placing connected split ring resonators in the vicinity of the aperture. We carried out numerical simulations that are consistent with our experimental conclusions. We experimentally show higher than 70,000-fold extraordinary transmission through a deep subwavelength aperture with an electrical size of ?/31×?/12 (width × length), in terms of the operational wavelength. We discuss the physical origins of the phenomenon. Our numerical results predict that even more improvements of the enhancement factors are attainable. Theoretically, the approach opens up the possibility for achieving very large enhancement factors by overcoming the physical limitations and thereby minimizes the dependence on the aperture geometries.
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