Dynamic wide gamut color generation using highly lossy metal-based metal-dielectric-metal structure

Dynamic structural color control across a wide spectral range was experimentally achieved via phase retardation between orthogonal polarization states in a Ni/SiO2/Ni-subwavelength grating (SWG) structure. The fabricated Ni/SiO2/Ni-SWG structure exhibited spectrally broadened resonant reflection dips due to the optical damping of Ni. The resonances induced a large phase retardation between the p- and s-polarizations over a wide spectral range, and the retardation changed the reflected polarization states depending on the wavelength. The rotation of the analyzing polarizer enabled the dynamic variation of the reflected structural color from the sample across the wide visible color gamut.