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讨论了利用由反常色散材料构成的二维 (2D)光子晶体 (PCs)实现超窄带滤波 (PCADOF)的原理 ,并对铯原子蒸气 6P3 2 ← 6S1 2 谱线的反常色散曲线进行了研究 ,讨论利用此反常色散曲线通过 2DPCs实现超窄带滤波的方法和特点 ,研究发现这种滤光器的带宽可达到 0 0 0 2nm ,这将为设计一种全新的滤波器提供指导
The principle of realizing ultra-narrowband filter (PCADOF) using two-dimensional (2D) photonic crystals (PCs) composed of anomalous dispersion materials is discussed. The anomalous dispersion curve of the 6P3 2 ← 6S12 emission line of cesium atom vapor is discussed. Using this anomalous dispersion curve to achieve ultra-narrowband filtering by 2DPCs methods and characteristics, the study found that the bandwidth of this filter can reach 0 0 0 2nm, which will provide guidance for the design of a new filter