Plasmonic MIM pixel (metapixel) concept. (a) Reflective LCoS microdisplay: schematic example of typical RGB-filter pixel array reflectors. Relatively large, pigment-based filters control color and hence each pixel can only be one color. From the conventional pixel to (b) the nanostructured plasmonic metapixel concept; demonstrating modulation of color. The designs are based on nanostructuring the available reflector area whereby for each target wavelength, a minimum of two absorption modes are tailored to sit either side of this wavelength thus eliminating the requirement for RGB filters in (a). The proposed pixel designs (i) and (ii), represent both 1D (sub-pixel 1D gratings) and 2D nanostructuring (sub-pixel isolated nanostructures) respectively, for achieving the different polarization dependent optical properties shown in the simulated reflection spectra above the schematics. For the 1D case (i), color modulation or near-perfect reflection can be controlled. For the 2D case (ii), multi-color modulation can be achieved. Hence now, pixels can include multiple state and multiple color functionality, yet still offer high reflection (due to MIM geometry).