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Finite-Size and Illumination Conditions Effects in All-Dielectric Metasurfaces
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Finite-Size and Illumination Conditions Effects in All-Dielectric Metasurfaces
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Journal Article
Finite-Size and Illumination Conditions Effects in All-Dielectric Metasurfaces
2022
Overview
Dielectric metasurfaces have emerged as a promising alternative to their plasmonic counterparts due to lower ohmic losses, which hinder sensing applications and nonlinear frequency conversion, and their larger flexibility to shape the emission pattern in the visible regime. To date, the computational cost of full-wave numerical simulations has forced the exploitation of the Floquet theorem, which implies infinitely periodic structures, in designing such devices. In this work, we show the potential pitfalls of this approach when considering finite-size metasurfaces and beam-like illumination conditions, in contrast to the typical infinite plane-wave illumination compatible with the Floquet theorem.
Publisher
MDPI AG
Subject
