Browsing by Keywords "Electromagnetic waves"
Now showing items 120 of 51

Analysis of an arbitrary profile reflector antenna having resistivetype surfaceHpolarization case
(IEEE, 20080607)A regularizationbased numerical solution is obtained for arbitraryshape conic section profile reflector antenna in 2D, for the Hpolarization case. New point is that the reflector surface is assumed a resistivetype ... 
Application of signalprocessing techniques to reduce the errors related to the FDTD excitations
(IEEE, 2001)A study on the reduction of the errors related to the finitedifference timedomain (FDTD) excitations was performed by employing signalprocessing techniques. Planewave scattering problems were simulated. The improvements ... 
Banddropping via coupled photonic crystal waveguides
(Optical Society of American (OSA), 2002)We observe the dropping of electromagnetic waves having a specific frequency or a certain frequency band in twodimensional dielectric photonic crystals. The single frequency is dropped via cavitywaveguide coupling. ... 
Beaming of electromagnetic waves emitted through a subwavelength annular aperture
(Optical Society of American (OSA), 2006)We study the diffraction of electromagnetic waves from subwavelength metallic circular apertures in the microwave spectrum. The theoretical and experimental demonstration of the near and farfield electromagnetic distributions ... 
Bioinsprired optoelectronic digital nose for breath analysis
(2011)A novel electronic nose device is presented that can be used in disease diagnostics by exhaled breath analysis. Exhaled breath contains more than a thousand organic compounds that can be analysed to insect various diseases ... 
Broadband circular polarizer based on highcontrast gratings
(Optical Society of America, 20120530)A circular polarizer, which is composed of periodic and twodimensional dielectric highcontrast gratings, is designed theoretically such that a unity conversion efficiency is achieved at λ0 = 1.55 μm. The operation is ... 
Compound Hertzian chain model for coppercarbon nanocomposites' absorption spectrum
(2011)The infrared range optical absorption mechanism of carboncopper composite thin layer coated on the diamondlike carbon buffer layer has been investigated. By consideration of weak interactions between copper nanoparticles ... 
Coupled deconvolution for frequency extrapolation of electromagnetic solutions with matrix pencil method
(IEEE, 2005)Matrix pencil method (MPM) has been widely used to estimate the parameters of complexexponential based models. An important application is the extrapolation of the frequencydomain solutions of electromagnetic problems. ... 
Coupled matrix pencil method for frequency extrapolation of electromagnetic solutions
(IEEE, 2005)Matrix pencil method (MPM) is used to extrapolate the available electromagnetic solutions in frequency domain to estimate the highfrequency solutions. A new approach, namely, coupled MPM, is introduced to obtain the ... 
Coupledcavity structures in photonic crystals
(Materials Research Society, 2002)We investigate the localized coupledcavity modes in twodimensional dielectric photonic crystals. The transmission, phase, and delay time characteristics of the various coupledcavity structures are measured and calculated. ... 
Designing materials with desired electromagnetic properties
(Wiley, 2006)In this work, we suggest and demonstrate a robust method to tune the plasma frequencies of wire mediums. The method we suggest involves the use of two or more wire arrangements in the unit cell. By incorporating the method ... 
Effect of crosssectional geometry on the RPA plasmons of quantum wires
(Pergamon Press, 1994)The effect of crosssectional geometry on both the intrasubband plasmon and intersubband plasmon of a quantum wire is investigated within a twosubband RPA scheme. Exact analytical electronic wavefunctions for circular, ... 
Efficient use of closedform Green's functions for threedimensional problems involving multilayered media
(IEEE, 199406)With the use of casting the spatial domain Green's functions into closed forms approach, it was demonstrated that the computational efficiency of the method of moments (MoM) for the solution of the mixed potential integral ... 
Electrically controlled terahertz spatial light modulators with graphene arrays
(IEEE, 2016)Gatetunable highmobility electrons on atomically thin graphene layers provide a unique opportunity to control electromagnetic waves in a very broad spectrum. In this paper, we describe an electricallycontrolled multipixel ... 
Electromagnetic wave focusing from sources inside a twodimensional lefthanded material superlens
(Institute of Physics Publishing, 2006)Lenses made of negative index materials exhibit different focusing behaviours compared to positive index material lenses. Flat lens behaviour and imaging below the diffraction limit is possible with negative refractive ... 
Electronic transport through a kink in an electron waveguide
(Institute of Electrical and Electronics Engineers, 1994)The currentvoltage denendence correspondinp to electronic transport through a kink in an electronic waveguide is analyzed. No phase breaking dissipation mechanisms are considered, but the effects of the Coulomb interaction ... 
Enhanced transmission of microwave radiation in onedimensional metallic gratings with subwavelength aperture
(American Institute of Physics, 2004)We report a theoretical and experimental demonstration of enhanced microwave transmission through subwavelength apertures in metallic structures with doublesided gratings. Three different types of aluminum gratings ... 
EU NoE metamorphose: Metamaterials research activities
(SPIE, 2005)We will present the activities of METAMORPHOSE a network of excellence (NoE) formed under EUFP6 on the area of metamaterials. The main scientific objective of the partners of this consortium is to develop new types of ... 
Experimental demonstration of highly confined photonic crystal based waveguides
(IEEE, 2001)The bending and guiding of the electromagnetic (EM) waves in highly confined waveguides was demonstrated. The electromagnetic waves were constructed by removing a single rod from a perfect three layerbylayer photonic ... 
Guiding and bending of photons via hopping in threedimensional photonic crystals
(IEEE, Piscataway, NJ, United States, 2000)For the past decade, photonic crystals, also known as photonic bandgap (PBG) materials, have inspired great interest because of their novel scientific and engineering applications such as the inhibition of spontaneous ...