Coupled-mode theory for resonant gratings with a varying period
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Published:2023-06
Issue:3
Volume:47
Page:
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ISSN:0134-2452
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Container-title:Computer Optics
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language:
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Short-container-title:Computer Optics
Author:
Bykov D.A., ,Bezus E.A.,Doskolovich L.L., , , , ,
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.
Publisher
Samara National Research University
Subject
Electrical and Electronic Engineering,Computer Science Applications,Atomic and Molecular Physics, and Optics
Cited by
3 articles.
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