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Nanoparticle-based metasurfaces for angular independent spectral filtering applications

Research output: Contribution to journalArticle

Francesco Lotti, Ali Mirzaei, Andrey E. Miroschnichenko, Anatoly Zayats

Original languageEnglish
Article number 213101
Pages (from-to) 213101-1
Number of pages213101
JournalJournal of Applied Physics
Volume126
Issue number21
DOIs
Publication statusPublished - 7 Dec 2019

King's Authors

Abstract

We designed a metasurface made of a monolayer of spherical nanoparticles embedded in a dielectric slab, which exhibits transmission prop-
erties independent of the incidence angle. Adjusting the electromagnetic coupling between high-index dielectric and hybrid core-shell nano-
particles enables the metasurface to operate in low-pass, bandpass, as well as band-stop regimes in the visible and near-infrared spectral
ranges. We demonstrate how symmetric properties of spherical nanoparticles determine the response of the metasurface, resulting in a spec-
tral filter with a wide angular acceptance range. We study transmission characteristics of the metasurface, such as frequency selectivity, the
slope of filtering at cutoff frequencies, and the robustness of the metasurface against experimental variations in geometrical parameters. Our
analyses show that the proposed approach can be used to design angular-independent spectral filters with the same material platform and
approach to operate in different regimes and spectral ranges.

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