Design of narrowband guided-mode resonance filters in visible wavelength region
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摘要: 为了使导模共振滤光片能在可见光范围内表现出良好的滤光效果,根据严格耦合波理论和等效介质理论,提出基于半导体材料单晶氧化锌薄膜的亚波长导模共振光栅滤光片的结构设计。通过仿真分析可知,该滤光片在可见光范围内的475nm,530nm与650nm波长处,反射效率都达到了100%,旁带反射率低于4%,并且峰值带宽均小于0.3nm。结果表明,该滤光片能分别在可见光的红、绿、蓝波段表现出良好的滤光效果,可以作为三基色的滤光片,在彩色合成与调制中得到重要的应用。Abstract: In order to achieve good filter performance of guided-mode resonance filters (GMRF) in visible light region, according to rigorous coupled wave theory and equivalent medium theory, a subwavelength GMRF filter was designed based on semiconductor material of ZnO. Simulation and analysis showed that reflection efficiency reached 100% at 475nm, 530nm and 650nm, with sideband reflectance below 4% and bandwidth less than 0.3nm. The results show that GMRF has excellent performance in red, green and blue wavelength region of visible light. GMRFs can be used as three-primary-color filters and are useful for color synthesis and modulation.
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Keywords:
- grating /
- filter /
- guided-mode resonance /
- ZnO
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