Font Size: 

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