Journal
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
Volume 38, Issue 9, Pages C78-C83Publisher
Optica Publishing Group
DOI: 10.1364/JOSAB.427939
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Funding
- Russian Foundation for Basic Research
- Krasnoyarsk Regional Fund of Science [20-42-240003]
- Ministry of Science and Higher Education of the Russian Federation [FSRZ-2020-0008]
- Krasnoyarsk Territory [20-42-240003]
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The study identified a narrowband substrate-mediated lattice Kerker effect in two-dimensional arrays of Al nanocylinders in a half-space geometry, providing new possibilities for sensing applications and demonstrating its broad tunability across the UV/Vis wavelength range.
Surface lattice resonances (SLRs) emerging in regular arrays of plasmonic nanoparticles (NPs) are known to be exceptionally sensitive to the homogeneity of the environment. It is considered necessary to have a homogeneous environment for engineering narrowband SLRs, while in a half-space environment, SLRs rapidly vanish as the contrast between the refractive indices of the substrate and superstrate increases. From this conventional wisdom, it is apparent that the delicate lattice Kerker effect emerging from SLRs and resonances on constituent NPs should be difficult to achieve in a non-homogeneous environment. Using a rigorous theoretical treatment with multipolar decomposition, we surprisingly find and explain a narrowband substrate-mediated lattice Kerker effect in two-dimensional arrays of Al nanocylinders in a half-space geometry. We propose to use this effect for sensing applications and demonstrate its broad tunability across the UV/Vis wavelength range. (C) 2021 Optical Society of America
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