Showing papers in "Metamaterials in 2011"

TL;DR: In this paper, the authors determine the rigorously calculated scattered field of meta-atoms and decompose it into spherical harmonics with complex amplitudes, transforming these harmonics into a Cartesian base reveals all multipole moments in this coordinate system.

TL;DR: In this article, transparent conducting oxides (TCO oxides) are used as alternative plasmonic materials for many specific applications, such as surface-plasmon-polariton waveguides and MMs with hyperbolic dispersion.

TL;DR: In this article, the authors derived an analytical model that relates the effective surface optical admittance of a single metasurface to its inclusion polarizability and its plane wave reflection and transmission coefficients, and applied these concepts to predict the wave interaction of more complicated setups in which two stacked surfaces are separated by varying distance, and possibly rotated with respect to one another, for normal incidence excitation.

TL;DR: In this article, a macroscopic model of a metasurface is presented for the case when the scatterers are non-resonant electric dipoles and for the cases when there is no substrate.

TL;DR: In this paper, the symmetry properties of planar arrays in long-wave approximation and for normal incidence were analyzed using group-theoretical methods and all possible magnetic groups for such structures were defined.

TL;DR: In this paper, a germanium-containing hybrid sol-gel photo-sensitive material for optical applications at micro scale was investigated, and the authors employed this material in the fabrication of photonic micro-structures, such as aspheric lenses and prisms.

TL;DR: In this article, a review of the recent progress made in the field of near-field focusing and near field imaging is presented, with simulation and experimental results presented to illustrate the focusing and imaging behavior.

TL;DR: In this article, the reflectivity of ESS with thickness about 2.3mm can be as low as −40dB and the absorption peak can be tuned from 3 GHz to 4 GHz, which is much wider than non-tunable metamaterials.

TL;DR: In this article, the authors analyzed the transmission properties of metallic plates with periodic arrays of subwavelength apertures in different shapes and found two conditions for such structures to work as super lenses.

TL;DR: In this paper, the authors discuss the homogenization of a metamaterial geometry composed of periodic arrays of densely packed subwavelength magnetodielectric spheres, in order to study whether a local quasi-isotropic homogenisation model may accurately describe its wave interaction in its negative-index or zero-index operation.

TL;DR: In this article, a method for homogenizing tensor transmission-line metamaterials is presented, which employs a local field averaging procedure to compute the effective material parameters.

TL;DR: In this article, the authors numerically demonstrate that plasmonic covers designed through the scattering cancellation approach can be successfully used to enhance the performance of near-field scanning optical microscopy (NSOM) systems based on the employment of aperture tip probes.

TL;DR: In this article, a comprehensive analysis of natural modes of a planar metamaterial layer (metalayer) formed by arrayed pairs of metallic dogbone-shaped conductors separated by a thin dielectric layer is presented.

TL;DR: In this paper, a design solution of metamaterial made of raspberry-like clusters of silver triangular nanoprisms was proposed and studied, which theoretically allows one to obtain isotropic negative effective permeability in the visible range even taking into account real dissipative losses in silver.

TL;DR: In this paper, the concept of wave-guiding medium is defined for the spherically symmetric case and it is shown that a quarter-wavelength layer of such a medium serves as a transformer of boundary conditions between the two interfaces.

TL;DR: In this paper, the authors demonstrate a metamaterial conductivity sensor that uses broadband interrogation of a line of coupled resonators and derive analytically an algorithm to extract the local perturbation in each element from the modal measurement.

TL;DR: In this paper, a 7-pole Chebyshev band pass filter in coplanar waveguide technology is presented, which is a combination of open split ring resonators (OSRRs) and OCSRRs.

TL;DR: In this article, a simple model of near-field pixel-to-pixel image transfer using magneto-inductive arrays is presented, where the response of N-dimensional rectangular arrays is first found as an excitation of eigenmodes.

TL;DR: In this paper, a numerical and experimental parametric analysis of anomalous enhanced transmission supported by dielectric-loaded holey metals is presented, where the authors focus on circular and square subwavelength hole apertures under normal and oblique incidence within the millimetre-wave regime.

TL;DR: In this article, the optical response and refractive properties of an fcc crystal of metallic nanoshells were investigated by means of full-electrodynamic layer-multiple-scattering simulations.

TL;DR: In this paper, a resonant coupling transducer was designed and experimentally realized for a magneto-inductive cable with the resonant frequency of 95 MHz and the pass band between 73 and 174 MHz.

TL;DR: In this article, the phase shift of magneto-inductive waveguides is demonstrated by ferrite loading of magnetically coupled L-C resonators, which consist of simple linear arrangements of magnetic coupled L−C resonator.

TL;DR: In this paper, the transfer function of some in-plane periodic split-ring metamaterial slab lenses is analyzed for several configurations across the slab and the closest behavior to the continuous slab lens was found for the partially open structure comprising an integer number of periods across a slab.

TL;DR: In this article, an analytical expression for the imaginary part of the dielectric tensor was derived using the plane-wave expansion method and a good agreement between the theory and experiment was obtained in the limit where the effective medium approximation is valid.

TL;DR: A theoretical study of harmonic generation from a silver grating having slits filled with GaAs has been conducted in this article, where the enhanced transmission regime that guarantees high field localization inside the slits, and the phase-locking mechanism that take place between the pump and its harmonics, allows enhanced harmonic generation under conditions of high absorption at visible and UV wavelengths.