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Plasmonic Color Filters as Dual‐State Nanopixels for High‐Density Microimage Encoding
Author(s) -
Heydari Esmaeil,
Sperling Justin R.,
Neale Steven L.,
Clark Alasdair W.
Publication year - 2017
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201701866
Subject(s) - color space , materials science , pixel , color filter array , plasmon , optics , encoding (memory) , high color , optoelectronics , computer science , artificial intelligence , color image , image processing , image (mathematics) , physics , color gel , nanotechnology , layer (electronics) , thin film transistor
Plasmonic color filtering has provided a range of new techniques for “printing” images at resolutions beyond the diffraction‐limit, significantly improving upon what can be achieved using traditional, dye‐based filtering methods. Here, a new approach to high‐density data encoding is demonstrated using full color, dual‐state plasmonic nanopixels, doubling the amount of information that can be stored in a unit‐area. This technique is used to encode two data sets into a single set of pixels for the first time, generating vivid, near‐full sRGB (standard Red Green Blue color space)color images and codes with polarization‐switchable information states. Using a standard optical microscope, the smallest “unit” that can be read relates to 2 × 2 nanopixels (370 nm × 370 nm). As a result, dual‐state nanopixels may prove significant for long‐term, high‐resolution optical image encoding, and counterfeit‐prevention measures.