理论研究了基于各向异性光子晶体带隙的窄带带通角度滤波器。利用电磁有限元数值仿真方法计算出不同入射角的光子晶体的角度带隙结构及掺杂后光子晶体的角度缺陷模。数值计算结果表明,随着入射角度的改变各向异性光子带隙结构是可调的,而且在这个系统中掺杂后能够产生随入射角度变化的窄带缺陷模,因此掺杂的各向异性结构具有角度滤波的特性,可以实现窄带角度滤波,有望在未来的光子器件中发挥作用。 A narrowband band-pass angle filter based on the bandgap of anisotropic photonic crystal is theoretically studied. The angle bandgap structures of photonic crystals with different incident angles and the angle defect modes of doped photonic crystals were calculated by electromagnetic finite element numerical simulation. The numerical results show that the anisotropic photonic band gap structure is tunable with the change of incident angle, and the narrow band defect modes with varying incident angles can be produced in this system. Therefore, the anisotropy structure With the characteristics of the angle of the filter, you can achieve narrow-band angle filtering, is expected to play a role in the future of photonic devices.