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This article is cited in 1 scientific paper (total in 1 paper)
DIFFRACTIVE OPTICS, OPTICAL TECHNOLOGIES
Coupled-mode theory for resonant gratings with a varying period
D. A. Bykovab, E. A. Bezusab, L. L. Doskolovichab a Image Processing Systems Institute of the RAS - Branch of the FSRC "Crystallography and Photonics" RAS, Samara, Russia, Samara
b Samara National Research University
Abstract:
We propose a coupled-mode theory for resonant diffraction gratings with a varying period. We consider diffractive structures, in which the reciprocal lattice vector, a quantity inversely proportional to the period, varies linearly in the direction of periodicity. It is shown that optical properties of such a structure essentially depend on the period change rate. On the basis of a comparison with the results of rigorous numerical simulations using the rigorous coupled-wave analysis, high accuracy of the proposed theoretical model is demonstrated. In particular, the developed coupled-mode theory describes the broadening of the resonant peak and the appearance of secondary maxima caused by a non-zero period change rate. The obtained results can be used for the development of linear variable filters based on resonant diffraction gratings with varying parameters.
Keywords:
resonance, grating, linearly varying filter, coupled-mode theory
Received: 30.09.2022 Accepted: 16.12.2022
Citation:
D. A. Bykov, E. A. Bezus, L. L. Doskolovich, “Coupled-mode theory for resonant gratings with a varying period”, Computer Optics, 47:3 (2023), 341–349
Linking options:
https://www.mathnet.ru/eng/co1132 https://www.mathnet.ru/eng/co/v47/i3/p341
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