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Here we report on the generation and engineering of polarized emission from aligned hybrid gold nanorods embedded in a Polyvinyl Alcohol film, where circularly polarized input light can be converted into broadband linearly polarized emission.
Tapering is shown to further extend the bandwidth of three-dimensional gold-helix metamaterials as broadband circular polarizers to about 1.5 octaves. Furthermore, the extinction ratio is improved. Theory and experiment show good agreement.
Broad-band, mass-normalized extinction cross-sections up to 1m2/g are demonstrated using chemically modified gold fractal nanostructures grown on silica microparticles.
During the last year, innovative designs that exploit the strong dependence of plasmonic modes on geometry have been proposed, offering new prospects on the tailoring of the optical properties of metal nanoparticles. On one hand, Fano resonances enable the opening of a narrow spectral window where light scattering is strongly inhibited. On the other hand, transformation optics makes possible the transfer...
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