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提出了一种基于一维缺陷光子晶体的可调谐偏振滤波器,将液晶膜层作为缺陷引入对称结构的一维光子晶体中,利用液晶电控双折射效应的动态可调节性,实现可调谐的偏振光窄带滤波。用传输矩阵法对这一新型滤波器的TM偏振光传输特性进行了数值计算,结果验证了此滤波器的可调节性。这种可调谐偏振滤波器具有结构简单易于制作、体积小易于集成、调谐方便、损耗很低、透射峰半峰全宽窄等突出优点,有望在光通信波分复用技术和光学精密测量技术中获得应用。
A tunable polarization filter based on one-dimensional defect photonic crystal is proposed. The liquid crystal layer is introduced into the one-dimensional photonic crystal with symmetrical structure as a defect. By using the dynamic adjustability of the electronically controlled birefringence effect, a tunable Polarized light narrowband filter. The transfer matrix method is used to numerically calculate the TM polarization of the new filter. The results show the tunability of this filter. The tunable polarization filter has the advantages of simple structure and easy fabrication, small size and easy integration, convenient tuning, low loss and narrow full width at half maximum of the transmission peak. It is expected that in optical communication wavelength division multiplexing technology and optical precision measurement technology Get the application.