Browsing by Author "Aydin, K."
Now showing items 1-20 of 40
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Capacitor-loaded split ring resonators as tunable metamaterial components
(AIP Publishing LLC, 2007)Transmission through split ring resonator (SRR) structures loaded with capacitors is investigated both experimentally and numerically. Magnetic resonance frequency (ωm) is observed to shift to lower frequencies when ... -
Compact size highly directive antennas based on the SRR metamaterial medium
(Institute of Physics Publishing, 2005)In this work, we studied the far-field properties of the microwave radiation from sources embedded inside the split-ring resonator (SRR) metamaterial medium. Our results showed that the emitted power near the resonance ... -
Determination of the effective constitutive parameters of bianisotropic metamaterials from reflection and transmission coefficients
(American Physical Society, 2009)We propose a method to retrieve the effective constitutive parameters of a slab of bianisotropic metamaterial from reflection and transmission coefficients (or scattering parameters). In our retrieval method, only the ... -
Enhanced transmission of electromagnetic waves through split-ring resonator-shaped apertures
(Society of Photo-Optical Instrumentation Engineers (SPIE), 2011-06-21)The design of aperture shape is a promising approach for enhanced transmission through a subwavelength aperture. We designed split-ring-resonator (SRR)-shaped apertures in order to increase the transmission through ... -
Enhanced transmission through a subwavelength aperture using metamaterials
(AIP Publishing LLC, 2009-08-04)We report an enhanced transmission through a single circular subwavelength aperture that is incorporated with a split ring resonator (SRR) at the microwave regime. Transmission enhancement factors as high as 530 were ... -
Enhanced transmission through sub-wavelength apertures by using metamaterials
(World Scientific Publishing Co., 2011)In this chapter, the role of complex artificial structures in enhancing the power transmission through sub-wavelength apertures is discussed. Such devices are aimed at exciting highly localized resonances in order to ... -
Equivalent-circuit models for the design of metamaterials based on artificial magnetic inclusions
(Institute of Electrical and Electronics Engineers, 2007)In this paper, we derive quasi-static equivalent-circuit models for the analysis and design of different types of artificial magnetic resonators-i.e., the multiple split-ring resonator, spiral resonator, and labyrinth ... -
Experimental and numerical analyses of the resonances of split ring resonators
(Wiley - VCH Verlag GmbH & Co. KGaA, 2007-03-20)The authors investigate the resonances of split‐ring resonator (SRR) structures experimentally and theoretically. The transmission measurements were performed on a single SRR unit cell and periodic arrays of SRRs. The ... -
Experimental and numerical study of omega type bianisotropic metamaterials combined with a negative permittivity medium
(Elsevier BV, 2008)We report on the transmission properties of the omega (Ω) type metamaterials. Transmission through the periodic Ω-only and Ω-wire metamaterials are studied experimentally and numerically. A resonance band gap is observed ... -
Experimental investigation of reflection characteristics of left-handed metamaterials in free space
(The Institution of Engineering and Technology, 2007)The transmission and reflection characteristics are presented of a one-dimensional (1D) left-handed metamaterial (LHM) and its constituents, split ring resonator and thin wire arrays. A well-defined left-handed transmission ... -
Experimental observasion of true left-handed transmission peaks in metamaterials
(Optical Society of America, 2004-11-15)We report true left-handed (LH) behavior in a composite metamaterial consisting of a periodically arranged split ring resonator (SRR) and wire structures. We demonstrate the magnetic resonance of the SRR structure by ... -
Experimental study of subwavelength focusing by lefthanded metamaterials with a negative refractive index
(2007)Two dimensional (2D) left-handed metamaterials (LHM) exhibiting negative refraction and subwavelength imaging are studied experimentally. A left-handed transmission band is observed at the frequencies where both dielectric ... -
Focusing of electromagnetic waves by a left-handed metamaterial flat lens
(Optical Society of America, 2005-10-31)We present here the experimental results from research conducted on negative refraction and focusing by a two-dimensional (2D) left-handed metamaterial (LHM) slab. By measuring the refracted electromagnetic (EM) waves from ... -
Highly directional emission from photonic crystals with a wide bandwidth
(AIP Publishing LLC, 2007)The authors numerically and experimentally demonstrated highly directional emission from photonic crystals. This was achieved by first splitting the incident electromagnetic wave into multiple beams using photonic crystal ... -
Highly directive radiation and negative refraction using photonic crystals
(Institute of Physics Publishing, 2005)In this article, we present an experimental and numerical study of certain optical properties of two-dimensional dielectric photonic crystals (PCs). By modifying the band structure of a two-dimensional photonic crystal ... -
A hybrid light source with integrated inorganic light-emitting diode and organic polymer distributed feedback grating
(Institute of Physics Publishing Ltd., 2008)We report a compact light source that incorporates a semiconductor light-emitting diode, nanostructured distributed feedback (DFB) Bragg grating and spin-coated thin conjugated polymer film. With this hybrid structure, we ... -
Identifying magnetic response of split-ring resonators at microwave frequencies
(Sciendo, 2006)In this study we provide experimental methods to identify the magnetic resonance of split ring resonators (SRR) at the microwave frequency regime. Transmission measurements were performed on both single SRR unit cell and ... -
Investigation of magnetic resonances for different split-ring resonator parameters and designs
(Institute of Physics Publishing, 2005)We investigate the magnetic resonance of split-ring resonators (SRR) experimentally and numerically. The dependence of the geometrical parameters on the magnetic resonance frequency of SRR is studied. We further investigate ... -
Left-handed metamaterial based superlens for subwavelength imaging of electromagnetic waves
(Springer, 2007-05)Lenses made of negative index materials have the ability to focus the propagating and evanescent components of electromagnetic waves. Such a possibility enables super resolution, in turn resulting in sharper, subwavelength ... -
Metamaterials with negative permeability and negative refractive index: Experiments and simulations
(Institute of Physics Publishing Ltd., 2007)We report the transmission characteristics of split-ring resonator and left-handed metamaterials (LHM) in the microwave frequency regime. A left-handed transmission band is observed at the frequencies where both dielectric ...
