提出了一种基于一维亚波长金属光栅结构的具有偏振片和彩色滤光片功能的偏振型彩色滤光片。该金属光栅由基底、介质光栅层介质层和金属光栅层等三部分组成。采用严格耦合波理论分析了介质光栅层介质层和金属光栅层对光谱特性的影响，模拟结果表明高折射率介质层介质光栅层的存在，能有效提高彩色滤光片的性能。给出三色彩色滤光片优化的结构参数，获得同时具有透射率大于72.6%的宽带滤波和偏振消光比大于40 dB的光谱输出。其中红色滤光片的中心波长650 nm，透射率极值72.60%；绿色滤光片的中心波长550 nm，透射率极值79.86%；蓝色滤光片的中心波长445 nm，透射率极值77.00%。通过循环利用TE偏振光，其透射率极大值可提高至117.8%。

A polarizing color filter based on one-dimensional (1D) subwavelength patterned metal grating combining the function of polarizer and color filter is proposed. The proposed device is consisted of three parts as a substrate, a dielectric grating-layer and a metal grating. The effects of the dielectric grating-layer and the metal grating are investigated in detail by rigorous coupled-wave analysis (RCWA) and its performance is enhanced effectively by utilizing a dielectric grating of high equivalent refractive index. Typical optimized structural parameters are obtained, in which more than 72.6% broadband transmission with greater than 40 dB polarization extinction ratio have been achieved simultaneously for tricolor filter. For the red color filter, the center wavelength is 650 nm and its corresponding transmittance is 72.60% for the green color one, the central wavelength is 550 nm and its corresponding transmittance is 79.86%, while for the blue color one, the central wavelength is 445 nm and its corresponding transmittance is 77.00%. The transmittance can be increased to 117.8％ with the recycle of the TE-polarized light.