Full text of article: Russian language.

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Abstract:
An asymptotic method for calculating the complex amplitude of a light field in the case of diffraction by non-periodic band gap structures. The novelty of the approach consists in the expansion of the solution of the integral equation into a basis that describes the propagation of light through a DOE within the geometrical optics approximation and changes into a basis of plane waves used in the calculation of diffraction gratings. We present the results of focusing into a point by a gradient-index diffractive optical element with a band-gap structure.  Simulation results confirm the efficiency of the proposed method.

Keywords:
diffractive optical element (DOE), asymptotic method, coupled-wave analysis, aperiodic structure, quasi-periodic structure, microrelief.

Citation:
Kharitonov SI, Doskolovich LL, Kazanskiy NL. Asymptotic methods for solving problems of diffraction by non-periodic structures. Computer Optics 2017; 41(2): 160-168. DOI: 10.18287/2412-6179-2017-41-2-160-168.

References:

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