Near-field Enhancement by Guided Bloch Modes at the Second Stop Band of a Nonlocal Optical Metasurface
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A4 Artikkeli konferenssijulkaisussa
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2023
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en
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3
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17th International Congress on Artificial Materials for Novel Wave Phenomena, Metamaterials 2023, pp. 445-447, International congress on advanced electromagnetic materials in microwaves and optics
Abstract
Nanoscale gaps in plasmonic dimers offer highly enhanced optical near-fields that can be used in optical sensing and detection. In this work, we show that the field in such gap hotspots can be further enhanced by combining the surface lattice resonances with Bloch modes at the second stop band of a nonlocal optical metasurface. This approach can be used to create efficient and reusable substrates for surface-enhanced Raman spectroscopy and other plasmonic sensors with cost-effective nanofabrication methods.Description
Funding Information: We acknowledge the Academy of Finland Flagship Programme, Photonics Research and Innovation (Grant No. 320167, PREIN). We also acknowledge the computational resources provided by the Aalto Science-IT project. Publisher Copyright: © 2023 IEEE.
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Zang, X & Shevchenko, A 2023, Near-field Enhancement by Guided Bloch Modes at the Second Stop Band of a Nonlocal Optical Metasurface . in 17th International Congress on Artificial Materials for Novel Wave Phenomena, Metamaterials 2023 . International congress on advanced electromagnetic materials in microwaves and optics, IEEE, pp. 445-447, International Congress on Artificial Materials for Novel Wave Phenomena, Chania, Greece, 11/09/2023 . https://doi.org/10.1109/Metamaterials58257.2023.10289597