Theoretical description and design of nanomaterial slab waveguides

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Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2018-04-02
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Language
en
Pages
14
9134-9147
Series
Optics Express, Volume 26, issue 7
Abstract
Planar optical waveguides made of designable spatially dispersive nanomaterials can offer new capabilities for nanophotonic components. As an example, a thin slab waveguide can be designed to compensate for optical diffraction and provide divergence-free propagation for strongly focused optical beams. Optical signals in such waveguides can be transferred in narrow channels formed by the light itself. We introduce here a theoretical method for characterization and design of nanostructured waveguides taking into account their inherent spatial dispersion and anisotropy. Using the method, we design a diffraction-compensating slab waveguide that contains only a single layer of silver nanorods. The waveguide shows low propagation loss and broadband diffraction compensation, potentially allowing transfer of optical information at a THz rate.
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Kivijärvi , V , Nyman , M , Shevchenko , A & Kaivola , M 2018 , ' Theoretical description and design of nanomaterial slab waveguides : Application to compensation of optical diffraction ' , Optics Express , vol. 26 , no. 7 , pp. 9134-9147 . https://doi.org/10.1364/OE.26.009134