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ISSN: 1023-5086

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ISSN: 1023-5086

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Opticheskii Zhurnal

A full-text English translation of the journal is published by Optica Publishing Group under the title “Journal of Optical Technology”

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DOI: 10.17586/1023-5086-2023-90-03-26-37

УДК: 535.016

Comparative analysis estimates for two-relief microstructures diffraction efficiency in the visible and dual infrared ranges in the framework of scalar and rigorous diffraction theories

Greisukh, G.I., Ezhov, E.G., Antonov, A.I., Danilov, V.A., Usievich, B.A.

Full text on elibrary.ru

For Russian citation (Opticheskii Zhurnal):

Грейсух Г.И., Ежов Е.Г., Антонов А.И., Данилов В.А., Усиевич Б.А. Сопоставительный анализ оценок дифракционной эффективности двухрельефных микроструктур видимого и двойного инфракрасного диапазонов в рамках скалярной и строгой теорий дифракции // Оптический журнал. 2023. Т. 90. № 3. С. 26–37. http://doi.org/10.17586/1023-5086-2023-90-03-26-37

 

Greisukh G.I., Ezhov E.G., Antonov A.I., Danilov V.A., Usievich B.A. Comparative analysis estimates for two-relief microstructures diffraction efficiency in the visible and dual infrared ranges in the framework of scalar and rigorous diffraction theories [in Russian] // Opticheskii Zhurnal. 2023. V. 90. № 3. P. 26–37. http://doi.org/10.17586/1023-5086-2023-90-03-26-37

For citation (Journal of Optical Technology):

G. I. Greisukh, E. G. Ezhov, A. I. Antonov, V. A. Danilov, and B. A. Usievich, "Comparative analysis estimates for two-relief microstructure diffraction efficiency in the visible and dual-infrared ranges in the framework of scalar and rigorous diffraction theories," Journal of Optical Technology. 90(3), 119-124 (2023). https://doi.org/10.1364/JOT.90.000119

Abstract:

Subject of study. Diffraction efficiency of two­layer diffractive microstructures with two sawtooth internal reliefs. Aim of study. Assess the reliability of the results degree obtained in the scalar approximation, but taking into account the real depths of two sawtooth reliefs (by the effective area method), when arranging and calculating microstructures intended for operation in the dual infrared range, including the middle and far infrared radiation subranges (3,4–11,4 µm). This applies to the selection of the optical materials optimal pairs, to the estimation of the relief optimal depths, and to the achievable diffraction efficiency the estimation within angles given range of incidence of radiation on the microstructure for a chosen relative spatial period of the microstructure. Method. Combined mathematical modeling within the framework of scalar and rigorous diffraction theories. Main results. It is shown that in the dual infrared range, additional electromagnetic optimization can give results that differ significantly from the results obtained by the effective area method only if the total depth of the reliefs exceeds the average wavelength of the working spectral range by more than an order of magnitude. Practical significance. The presented results open up the possibility of a significant reduction in labor costs in the refractive­diffractive dual infrared lenses design.

 

Acknowledgment: the study was supported by a grant from the Russian Science Foundation (Project № 20­19­00081).

Keywords:

two­layer diffractive microstructure, diffraction efficiency, scalar and rigorous diffraction theories, dual infrared range

OCIS codes: 050.0050

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