Dual Resonant Plasmonic Infrared Pixels for Selective Optical Encoding

Abstract

Plasmonic metasurfaces allow the optical encoding of information based on bright and non-fading colors with a resolution at the diffraction limit. The optical information is encoded by varying the dimensional parameters of the plasmonic nanostructures, which are then clustered into nanopixels that are parallel and spectrally addressable. The storage density can be further increased by employing asymmetric and polarization-dependent nanostructures. However, further increases in storage density and security capabilities are still vital for the successful implementation of plasmonic metasurfaces as encoding and encryption solutions. Recent progress in infrared hyperspectral imaging has opened u..