title: Transmission enhancement through deep subwavelength apertures using connected split ring resonators.
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 lambda/31 x lambda/12 (width x 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.
authors.affiliation: Department of Electrical and Electronics Engineering, Nanotechnology Research Center (NANOTAM), Bilkent University, 06800, Ankara, Turkey. damla@ee.bilkent.edu.tr
authors.forename: Damla
authors.initials: D
authors.lastname: Ates
authors.forename: Atilla Ozgur
authors.initials: AO
authors.lastname: Cakmak
authors.forename: Evrim
authors.initials: E
authors.lastname: Colak
authors.forename: Rongkuo
authors.initials: R
authors.lastname: Zhao
authors.forename: C M
authors.initials: CM
authors.lastname: Soukoulis
authors.forename: Ekmel
authors.initials: E
authors.lastname: Ozbay
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008872:Microwaves; D055096:Optical Devices; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation; D014159:Transducers