基于光子晶体的温控滤波器特性分析

An Analysis of the Properties of Temperature-modulation Filter Based on Photonic Crystal

从二维光子晶体薄膜结构出发,研究了光子晶体点缺陷的透射谱。研究发现改变缺陷微腔的半径可以调整缺陷模中心频率的位置。此外,缺陷微腔的折射率也对缺陷模频率位置产生影响。提出了在缺陷微腔填充高温度折射率系数材料,通过温度调控缺陷微腔的折射率从而控制缺陷模频率的设想。采用数值模拟方法分析了结构的温度特性,结果证实了设计的合理性。此结果为设计基于光子晶体点缺陷薄膜的温控滤波器器件提供参考。

The transmission spectra of the photonic crystal point defects are studied based on twodimensional photonic crystal film structure. It is found that the resonant frequency of the defect mode can be adjusted by the radius of the micro cavity. In addition, the refractive index of the micro cavity also affects the frequency of the defect mode. Based on this, a high temperature refractive index coefficient material is filled in the micro cavity so the frequency of defect mode can be controlled by the refractive index modulated by temperature. Numerical simulation method is used to analyze the temperature properties, and the results show the design is reasonable. The conclusion might be used for the design of temperature-modulation filter based on photonic crystal point defect films.