Results 81 to 90 of about 32,796 (196)

Focusing Light with Curved Guided-Mode Resonance Reflectors

Micromachines, 2011
Employing numerical simulations, we investigate the possibility of using curved guided-mode resonance (GMR) elements to focus light in reflection. We treat GMR reflectors with a parabolic shape and show that they are capable of focusing light effectively
Robert Magnusson, Huiqing Zhai, Mingyu Lu   +2 more
doaj   +1 more source

Periodic crack-model of comb transducers: excitation of interface waves

Archives of Acoustics, 2000
A model for a comb transducer is proposed and analyzed. It is shown that interface waves are generated in the comb-sample contact area. The interface waves are leaky waves that transport acoustic energy along the interface towards the comb edges, where ...
E. DANICKI
doaj  

Wideband Modal Analysis of a Double-Layer Line-Wave Waveguide: Dispersive Properties and Radiative Effects

IEEE Open Journal of Antennas and Propagation
A broadband modal analysis of a double-layer line-wave waveguide constituted by two center-symmetric pairs of inductive and capacitive metasurfaces is presented, with the aim of characterizing the dispersive and radiative properties of the relevant line ...
Mikhail Madji, Paolo Baccarelli, Alessio Monti, Alessandro Toscano, Filiberto Bilotti, Paolo Burghignoli   +5 more
doaj   +1 more source

Dielectric EBG Leaky-Wave Antenna: Design and Experimental Validation

IEEE Open Journal of Antennas and Propagation
This paper proposes a novel Electromagnetic Band-Gap (EBG) leaky-wave antenna (LWA) operating in the K-band with enhanced directivity at broadside. A rigorous method that combines the analysis of the band diagrams of Bloch waves propagating within two ...
Ludovica Tognolatti, Paolo Baccarelli, Cristina Ponti, Silvio Ceccuzzi, Vakhtang Jandieri, Giuseppe Schettini   +5 more
doaj   +1 more source

Rayleigh Bound States in the Continuum in Shallow Surface Relief Phononic Crystals

Crystals
We present an investigation into the band structure of acoustic waves in surface phononic crystals (SPnC), which comprise a square lattice of shallow cylinders on a mechanically isotropic semi-infinite substrate, utilizing the finite element method (FEM).
Francesc Alzina
doaj   +1 more source

Realizable Leaky Wave Antenna Based on Spin Photonic Topological Insulators

IEEE Access
The discovery of topological insulators and their photonic counterparts has led to significant advancements in electromagnetics. These materials offer an innovative way to control electromagnetic fields at the interface of trivial and topological ...
Sayyed Ahmad Abtahi, Mohsen Maddahali, Ahmad Bakhtafrouz   +2 more
doaj   +1 more source

The history and properties of ultrasonic inhomogeneous waves [PDF]

, 2005
BRIERS, R, Declercq, Nico, Degrieck, Joris, Leroy, O   +3 more
core   +1 more source

Generation of Surface Sausage Oscillations of a Current Sheet and Propagating Magnetoacoustic Waves by Impulsive Reconnection

The Astrophysical Journal
Magnetic reconnection and magnetohydrodynamic waves may well be both playing a role in coronal heating. In this paper, we simulate reconnection in the corona as a response to the convergence of opposite-polarity magnetic sources at the base of the corona.
Sripan Mondal, A. K. Srivastava, David I. Pontin, Eric R. Priest   +3 more
doaj   +1 more source

Leaky-wave array antenna. [PDF]

Journal of Radio Electronics, 2019
V. A. Kaloshin, C. T. Nguyen
openaire   +1 more source

Scholte-Stoneley waves on an immersed solid dihedral : generation, propagation and scattering effects [PDF]

, 2014
Declercq, Nico F, Degrieck, Joris, Lamkanfi, Ebrahim, Van Paepegem, Wim   +3 more
core   +1 more source