Journal ArticleDOI
Analysis of TM scattering from finite rectangular grooves in a conducting plane
TLDR
In this paper, a Fourier transform technique is employed to express the scattered field in the spectral domain as a superposition of the parallel-plate waveguide modes, and the boundary conditions are enforced on the conducting surface and the groove apertures to obtain simultaneous equations for the transmitted field inside the grooves.Abstract:
TM-wave scattering from rectangular grooves in a perfectly conducting plane is investigated. A Fourier-transform technique is employed to express the scattered field in the spectral domain as a superposition of the parallel-plate waveguide modes. The boundary conditions are enforced on the conducting surface and the groove apertures to obtain simultaneous equations for the transmitted field inside the grooves. The simultaneous equations are solved to obtain the transmitted field in a series representation that reduces to a closed form in a high-frequency scattering regime. With the use of the stationary phase approximation, the far-zone scattered field is obtained, and its scattering behavior is studied in terms of the scattering angle. The diffraction efficiency for the finite grating as the number of grooves increases is presented.read more
Citations
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Journal ArticleDOI
Finite-difference time-domain modeling of nonperfectly conducting metallic thin-film gratings
TL;DR: In this paper, a simulation tool based on the finite-difference time-domain (FDTD) technique is developed to model the electromagnetic interaction of a focused optical Gaussian beam in two dimensions incident on a simple model of a corrugated dielectric surface plated with a thin film of realistic metal.
Journal ArticleDOI
Scattering from metallic surfaces having a finite number of rectangular grooves
TL;DR: In this article, a modal theory is presented for solving the problem of electromagnetic scattering from a surface consisting of a finite number of one-dimensional rectangular grooves in a metallic plane, where the incident plane wave can be polarized with either its electric or its magnetic field along the grooves.
Journal ArticleDOI
Metallic-Rectangular-Grooves Based 2D Reflectarray Antenna Excited by an Open-Ended Parallel-Plate Waveguide
TL;DR: In this paper, the scattering solutions for a metallic-rectangular-grooves based two-dimensional (2D) reflectarray antenna excited by an open-ended parallel-plate waveguide are obtained using an overlapping T-block method and the Stratton-Chu formula.
Journal ArticleDOI
High-order integral equation methods for problems of scattering by bumps and cavities on half-planes.
TL;DR: The algorithms introduced in this paper apply to eight classical scattering problems, namely, scattering by a dielectric bump on a perfectly conducting or a Dielectric half-plane, and scatteringBy a filled, overfilled, or void dielectic cavity on aperfectly conducting or dielectrics half-planes.
Journal ArticleDOI
Vector diffraction from subwavelength optical disk structures: two-dimensional modeling of near-field profiles, far-field intensities, and detector signals from a dvd
Wei Chih Liu,Marek W. Kowarz +1 more
TL;DR: Insight is provided into the vector-diffraction effects encountered in high-density optical data storage systems and an efficient finite-difference frequency-domain method is developed for calculating the electromagnetic fields in the neighborhood of subwavelength dielectric and metallic structures.
References
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Journal ArticleDOI
Bragg-angle blazing of diffraction gratings.
A. Hessel,J. Schmoys,D. Y. Tseng +2 more
TL;DR: In this article, the Bragg condition λ = 2d sin θ is presented as a necessary condition for perfect blazing of infinite, perfectly conducting diffraction gratings that produce only a single diffracted order, n = −1.
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Scattering by a truncated periodic array
W. L. Ko,Raj Mittra +1 more
TL;DR: In this article, the effect of truncation of a frequency-selective surface (FSS) on its scattering characteristics was investigated, and the spectral properties of the truncated array were computed using the spectra-Galerkin method.
Journal ArticleDOI
Perfectly blazed reflection gratings with rectangular grooves
James W. Heath,E.V. Jull +1 more
TL;DR: In this paper, the coefficients of the matrices governing the scattered mode amplitudes are given for plane electromagnetic wave incidence on a perfectly conducting periodic surface with a rectangular groove profile, the coefficients decompose when the Bragg condition is satisfied, facilitating computation.
Journal ArticleDOI
Boundary-value solution to electromagnetic scattering by a rectangular groove in a ground plane
TL;DR: In this paper, the diffraction of a plane electromagnetic wave by a rectangular groove corrugated in a perfectly conducting ground plane is rigorously formulated in terms of a Fourier-type integral for two orthogonal polarizations.
Journal ArticleDOI
Apparent size of reflecting polygonal obstacles of the order of one wavelength
Dil Jan Gerard,B. A. J. Jacobs +1 more
TL;DR: In this article, it was shown that the apparent depth of a groove can be smaller or larger than the geometrical depth, depending on the polarization of the incident light and on the optical constants of the substrate.