一维光子晶体的湿敏禁带特性研究

Characteristics of humidity sensitive band gap for one-dimensional photonic crystal

采用二维纳米材料作周期性排列设计了一种湿敏型一维光子晶体纳米结构,并基于多层介质的传输矩阵光学特性,研究了所设计传感结构的透射光谱的湿敏光学特性及其湿敏禁带特性,以及在TE和TM两种光波传播模式下一维光子晶体能带结构的光子禁带与环境湿度之间的变化关系。结果表明:TE模式和TM模式下,在0%~100%的相对湿度变化范围内,一维光子晶体具有显著的光子禁带,且光子禁带的初始波长、截止波长及禁带宽度都随环境湿度呈二次方规律变化。

A humidity sensitive one-dimensional photonic crystal structure is designed by use of twodimensional nano materials with a periodic arrangement,and then based on the optical properties of the transfer matrix of multilayer media,the humidity sensitive optical properties and humidity sensitive band gap properties of the transmission spectrum of the designed sensing structure are studied,as well as the relationship between environmental humidity and the band structure of one-dimensional photonic crystal under the two light propagation modes of TE and TM.The results show that in TE and TM modes,the one-dimensional photonic crystal has an obvious photonic band gap in the range of 0%~100%relative humidity,and the start wavelength,termination wavelength and band gap width of the photonic band gap change regularly with the environmental humidity.