Browsing by Keywords "Resonance"
Now showing items 120 of 56

45GHz bandwidthefficiency resonantcavityenhanced ITOSchottky photodiodes
(IEEE, 2001)Highspeed Schottky photodiodes suffer from low efficiency mainly due to the thin absorption layers and the semitransparent Schottkycontact metals. We have designed, fabricated and characterized highspeed and highefficiency ... 
Allaluminum hierarchical plasmonic surfaces in the infrared
(The Optical Society, 2016)AllAluminum metalinsulatormetal resonator structures withmultiple metalinsulator stacks showing resonances in the midinfrared(MIR) are fabricated. Ultrathin native Al2O3 is used as the insulator layersenabling simple ... 
Analysis of doublenegative materials with surface integral equations and the multilevel fast multipole algorithm
(2011)We present a fast and accurate analysis of doublenegative materials (DNMs) with surface integral equations and the multilevel fast multipole algorithm (MLFMA). DNMs are commonly used as simplified models of metamaterials ... 
Analysis of nonequilibrium steadystates
(Bilkent University, 201612)Nonequilibrium is the state of the almost all systems in the universe. Unlike equilibrium systems, they interfere with their surroundings which results in never ceasing uxes. There is no unified theory to understand these ... 
Atomic and electronic structure of carbon strings
(IOP Publishing Ltd., 2005)This paper presents an extensive study of various string and tubular structures formed by carbon atomic chains. Our study is based on firstprinciples pseudopotential plane wave and finitetemperature ab initio molecular ... 
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 ... 
Directional selectivity through the subwavelength slit in metallic gratings
(2011)An approach for obtaining strong directional selectivity through a single subwavelength slit in nonsymmetric metallic gratings is shown theoretically and experimentally. Directionality effect originates from the different ... 
Directivity enhancement and deflection of the beam emitted from a photonic crystal waveguide via defect coupling
(Optical Society of American (OSA), 2007)We experimentally and numerically investigate the spatial distribution of the emission from a photonic crystal waveguide, coupled with defects, that are located at the output edge. Two defects that are located symmetrically ... 
Dynamic tuning of plasmon resonance in the visible using graphene
(The Optical Society, 2016)We report active electrical tuning of plasmon resonance of silver nanoprisms (Ag NPs) in the visible spectrum. Ag NPs are placed in close proximity to graphene which leads to additional tunable loss for the plasmon resonance. ... 
EFIE and MFIE, why the difference?
(2008)EFIE (electric field integral equation) suffers from internal resonance, and the remedy is to use MFIE (magnetic field integral equation) to come up with a CFIE (combined field integral equation) to remove the internal ... 
Electromagnetic scattering of THz waves from a microsize graphenesandwiched thin dielectric strip
(IEEE Computer Society, 2018)Twodimensional (2D) scattering of the Hpolarized plane wave by a composite flat material strip is investigated. It is made as graphenedielectricgraphene sandwichlike structure which is placed in the free space. Our ... 
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 ... 
Experimental study of linear closedloop control of subsonic cavity flow
(2006)A study is presented of the modeling and implementation of different concepts for linear feedback control of a singlemode resonance shallow cavity flow. When a physicsbased linear model is used for cavity pressure ... 
Fano effect in a double Tshaped interferometer
(Springer, 2009)We study the coherent transport in a onedimensional lead with two sidecoupled quantum dots using the Keldysh's Green function formalism.The effect of the interdot Coulomb interaction is taken into account by computing ... 
Fast and accurate analysis of large metamaterial structures using the multilevel fast multipole algorithm
(2009)We report fast and accurate simulations of metamaterial structures constructed with large numbers of unit cells containing splitring resonators and thin wires. Scattering problems involving various metamaterial walls are ... 
Ferroelectric based tuneable SRR based metamaterial for microwave applications
(2007)We discuss the possibility of achieving tunable split ring resonators at microwave frequencies. One method is to use varying capacitance values to tune the magnetic resonance frequency. As another method ferroelectric thin ... 
Flexible strain sensors based on electrostatically actuated graphene flakes
(Institute of Physics Publishing, 2015)In this paper we present flexible strain sensors made of graphene flakes fabricated, characterized, and analyzed for the electrical actuation and readout of their mechanical vibratory response in strainsensing applications. ... 
Förster resonance energy transfer enhanced colorconversion using colloidal semiconductor quantum dots for solid state lighting
(American Institute of Physics, 20091015)In this paper, we present Förster resonance energy transfer (FRET)enhanced colorconversion using colloidal semiconductor quantum dot nanocrystals (NCs) to make reddishorange lightemitting diodes for use in ultraefficient ... 
Harmonic cantilevers for nanomechanical sensing of elastic properties
(Institute of Electrical and Electronics Engineers Inc., 2003)We present a micromachined scanning probe cantilever, in which a specific higher order flexural mode is designed to be resonant at an exact integer multiple of the fundamental resonance frequency. We have demonstrated that ...