Interaction of Gaussian beams with a conducting finite grating: reflection case

G. Torres-Morales; J. Sumaya-Martínez; A. Pato-Córdoba

doi:10.1117/12.912508

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14 October 2011 Interaction of Gaussian beams with a conducting finite grating: reflection case

G. Torres-Morales, J. Sumaya-Martínez, A. Pato-Córdoba

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Proceedings Volume 8287, Eighth Symposium Optics in Industry; 82870S (2011) https://doi.org/10.1117/12.912508
Event: Eighth Symposium Optics in Industry, 2011, Toluca de Lerdo, Mexico

Abstract

Diffraction of an obliquely incident TE-polarized Gaussian beams by 􀜰 equally spaced slits (finite lamellar grating) with conducting substrate is treated. The substrate can be either vacuum or conductor. The diffracted and scattered patterns, the transmission and reflection coefficients, and the normally diffracted energy are analyzed as a function of several optogeometrical parameters. Particularly, the coupling between slits and the influence of the substrate is considered. We have found that, when the substrate is a conductor the grating equation in reflection predicts with good precision the angular positions of the orders of a finite grating; the angular positions of these orders are independents of the beam width, the spot position on the finite grating, and the conductivity of the substrate. Besides, the envelope of the reflected energy is conserved constant when the position of the spot is changed.

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G. Torres-Morales, J. Sumaya-Martínez, and A. Pato-Córdoba "Interaction of Gaussian beams with a conducting finite grating: reflection case", Proc. SPIE 8287, Eighth Symposium Optics in Industry, 82870S (14 October 2011); https://doi.org/10.1117/12.912508

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