META 2021, META'12

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Optics of free-standing nanostructure arrays: application to multispectral imaging
Stéphane Collin, Grégory Vincent, Petru Ghenuche, Nathalie Bardou, Riad Haïdar, Jean-Luc Pelouard

Last modified: 2011-12-05


We report on the spectacular properties of free-standing arrays of metallic and dielectric nanostructures. We demonstrate nearly perfect resonant transmission (87 %) in metallic membranes with nanoslits mediated by plasmonic resonances. We report the fabrication of a mosaic of bandpass filters by changing the slit pattern in a single 25mm² membrane. The filter array is integrated in a compact multichannel camera, and parallel multispectral imaging is achieved in the 2.5-5µm wavelength range. We also provide the first experimental evidence of nearly perfect optical extinction in a single layer of free-standing dielectric nanorods. The sharp spectral opacity window, in the form of a characteristic Fano resonance, arises from coherent multiple scattering in the array.


plasmonics, nanophotonics, coherent multiple scattering, multispectral imaging