Tailoring Single Plasmonic Resonance for RGB‐NIR Imaging Using Nanoimprinted Complementary Plasmonic Structures of Nanohole and Nanodisk Arrays

Plasmonic nanohole arrays (NHA) can serve as an efficient alternative for ultrathin color filters due to their high tunability, robust stability, and simple nanofabrication. However, the periodic nanostructures inherently exhibit multiple resonances in visible near-infrared ranges. Here large-area single-resonance plasmonic spectral filter RGB-NIR imaging using nanoimprinted complementary structures (CPS) is reported. The CPS comprise self-aligned metallic nanodisk regular (rCPS) or inverse (iCPS) configuration, where unfavorable of are substantially attenuated by extinction resonance arrays. experimental results show single peaks 437 (blue), 515 (green), 644 (red), 912 nm (NIR), respectively. purity highly increased up six times thus reproduction range expanded four times, compared NHA. clearly demonstrate tetrachromatic imaging, resulting from true recognition distinctive NIR features. This unique configuration large-scale that drive multispectral hyperspectral applications.