Abstract: Color filter incorporating a subwavelength triangular-lattice cylinder arrays in metal-dielectric films on quartz substrate was proposed. The device consists of a quartz substrate, a triangular-lattice cylinder arrays in both dielectric layer of ZnS and a metallic layer of aluminum (Al). The broadband transmission characteristic of the proposed device in the visible wavelength range was investigated in detail by the rigorous coupled wave analysis (RCWA). Specially by discussing the effects of the structure parameters to the resonant wavelength, typical optimized structure parameters are obtained, in which more than 74.6% peak transmission efficiency with FWHM of ~ 80 nm were simultaneously achieved for the tricolor filters. The simulation results show that the peak transmission efficiency (PET) increases more than 17% with lower color cross-talk compared to the previous color filters.
High transmission and low color cross-talk plasmonic color filters using triangular-lattice hole arrays in aluminum films
