Resonant effects in periodic gratings comprising a finite number of grooves in each period

Angela N. Fantino, Susana I. Grosz, and Diana C. Skigin
Phys. Rev. E 64, 016605 – Published 20 June 2001
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Abstract

We give numerical evidence of a kind of resonance that appears in infinite perfectly conducting gratings comprising a finite number of grooves in each period when illuminated by a normally incident p-polarized plane wave. This phenomenon is intimately connected with the particular distribution of the phase of the electromagnetic field inside the cavities, which is automatically generated by waves of certain resonant wavelengths. The resonances appear as sharp peaks in the specularly reflected efficiency and are accompanied by a significant intensification of the interior field. We study the particular case of rectangular cavities and consider configurations with different numbers of grooves per period. The diffraction problem is solved for s and p polarization by using the modal method, which proves to be especially suitable for this profile.

  • Received 28 December 2000

DOI:https://doi.org/10.1103/PhysRevE.64.016605

©2001 American Physical Society

Authors & Affiliations

Angela N. Fantino, Susana I. Grosz, and Diana C. Skigin*

  • Grupo de Electromagnetismo Aplicado, Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón I, 1428 Buenos Aires, Argentina

  • *Electronic address: dcs@df.uba.ar

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Vol. 64, Iss. 1 — July 2001

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