Multispectral Sharp Plasmon Resonances for Polarization-Manipulated Subtractive Polychromatic Filtering and Sensing

Compared with the conventional color filter with the only one fixed output color filtering, developing active multicolor filters with controllable color output can lead to more compact and sophisticated color filter-based devices. We propose and demonstrate a plasmon scheme consisting of a nonclose-packed cross-shaped metallic antenna array for active subtractive multicolor filtering and high-quality sensing. Multiband antireflection spectrum with ultra-narrow bandwidths (