Thickness optimization algorithm to improve multilayer diffractive optical elements performance

Victor  Laborde; J.J.D. Loicq; Juriy  Hastanin; Serge  Habraken

doi:10.1364/AO.474107

Thickness optimization algorithm to improve multilayer diffractive optical elements performance

Victor Laborde, J.J.D. Loicq, Juriy Hastanin, Serge Habraken

Spaceborne Instrumentation

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Abstract

The diffractive zone thicknesses of conventional diffractive optical elements (DOEs) are generally obtained using the thin element approximation (TEA). However, the TEA yields inaccurate results in the case of thick multilayer DOEs (MLDOEs). The extended scalar theory (EST) is an alternative thickness optimization method that depends on the diffractive order and the optimization wavelength. We developed an algorithm to research suitable EST input parameters. It combines ray-tracing and Fourier optics to provide a performance estimate for each EST parameter pair. The resulting “best”MLDOEdesigns for three different material combinations are analyzed using rigorous finite-difference time-domain. Compared to the TEA, the proposed algorithm can provide performing zone thicknesses.

Original language	English
Pages (from-to)	836-843
Number of pages	8
Journal	Applied Optics
Volume	62
Issue number	3
DOIs	https://doi.org/10.1364/AO.474107
Publication status	Published - 2023

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Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

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title = "Thickness optimization algorithm to improve multilayer diffractive optical elements performance",

abstract = "The diffractive zone thicknesses of conventional diffractive optical elements (DOEs) are generally obtained using the thin element approximation (TEA). However, the TEA yields inaccurate results in the case of thick multilayer DOEs (MLDOEs). The extended scalar theory (EST) is an alternative thickness optimization method that depends on the diffractive order and the optimization wavelength. We developed an algorithm to research suitable EST input parameters. It combines ray-tracing and Fourier optics to provide a performance estimate for each EST parameter pair. The resulting “best”MLDOEdesigns for three different material combinations are analyzed using rigorous finite-difference time-domain. Compared to the TEA, the proposed algorithm can provide performing zone thicknesses. ",

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AU - Laborde, Victor

AU - Loicq, J.J.D.

AU - Hastanin, Juriy

AU - Habraken, Serge

N1 - Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

PY - 2023

Y1 - 2023

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Thickness optimization algorithm to improve multilayer diffractive optical elements performance

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