Standard red green blue (sRGB) color representation with a tailored dual-resonance mode in metal/dielectric stacks

Abstract

Lithography-free planar structures have been the subject of many studies on structural coloration in recent years because of mass production and large-area applications. Among them, the metal-insulator-metal (MIM) structure follows a subtractive color system. However, the limited gamut of this system hinders a wider application of reflective color filters. We demonstrate a planar metal-insulator-metal-insulator-metal (MIMIM) structure for a tunable dual-resonance mode, by combining each single-resonance mode in MIM structures. By controlling the resonance dips, we obtain standard red/green/blue (sRGB) in the standard color space for modern optical devices. The reflectance spectra, color representation, and fabricated samples verify the dual-resonance tunability and generation of sRGB colors. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement