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Abstract:

Diffraction of electromagnetic plane waves by the gratings made by periodically corrugating the exposed planar boundaries of homogeneous, isotropic, linear dielectric-magnetic half-spaces is examined. The phase velocity vector in the diffracting material can be either co-parallel or anti-parallel to the time-averaged Poynting vector, thereby allowing for the material to be classified as of either the positive- or the negative-phase velocity (PPV or NPV) type. Three methods used for analyzing dielectric gratings - the Rayleigh-hypothesis method, a perturbative approach, and the C formalism - are extended here to encompass NPV gratings by a careful consideration of field representation inside the refracting half-space. Corrugations of both symmetric as well as asymmetric shapes are studied, as also the diversity of grating response to the linear polarization states of the incident plane wave. The replacement of PPV grating by its NPV analog affects only nonspecular diffraction efficiencies when the corrugations are shallow, and the effect on specular diffraction efficiencies intensifies as the corrugations deepen. Whether the type of the refracting material is NPV or PPV is shown to affect surface wave propagation as well as resonant excitation of surface waves. © 2005 Elsevier GmbH. All rights reserved.

Registro:

Documento: Artículo
Título:Diffraction gratings of isotropic negative-phase velocity materials
Autor:Depine, R.A.; Lakhtakia, A.
Filiación:Grupo De Electromagnetismo Aplicado, Departamento De Física, Fac. De Cie. Exact. Y Nat., Univ. D., Pabellón I, 1428 Buenos Aires, Argentina
Compl. and Theor. Mat. Sci. Group, Dept. of Eng. Science and Mechanics, Pennsylvania State University, University Park, PA 16802-6812, United States
Palabras clave:Grating; Negative-phase velocity; Nonspecular diffraction; Numerical techniques; Surface waves; Boundary value problems; Dielectric devices; Electromagnetism; Image analysis; Lenses; Light polarization; Light reflection; Light refraction; Magnetic materials; Maxwell equations; Optics; Perturbation techniques; Surface waves; Vectors; Helmholtz equations; ii; Negative-phase velocity materials; Nonspecular diffraction; Numerical techniques; Diffraction gratings
Año:2005
Volumen:116
Número:1
Página de inicio:31
Página de fin:43
DOI: http://dx.doi.org/10.1016/j.ijleo.2004.11.004
Título revista:Optik
Título revista abreviado:Optik
ISSN:00304026
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00304026_v116_n1_p31_Depine

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Citas:

---------- APA ----------
Depine, R.A. & Lakhtakia, A. (2005) . Diffraction gratings of isotropic negative-phase velocity materials. Optik, 116(1), 31-43.
http://dx.doi.org/10.1016/j.ijleo.2004.11.004
---------- CHICAGO ----------
Depine, R.A., Lakhtakia, A. "Diffraction gratings of isotropic negative-phase velocity materials" . Optik 116, no. 1 (2005) : 31-43.
http://dx.doi.org/10.1016/j.ijleo.2004.11.004
---------- MLA ----------
Depine, R.A., Lakhtakia, A. "Diffraction gratings of isotropic negative-phase velocity materials" . Optik, vol. 116, no. 1, 2005, pp. 31-43.
http://dx.doi.org/10.1016/j.ijleo.2004.11.004
---------- VANCOUVER ----------
Depine, R.A., Lakhtakia, A. Diffraction gratings of isotropic negative-phase velocity materials. Optik. 2005;116(1):31-43.
http://dx.doi.org/10.1016/j.ijleo.2004.11.004