基于一维光子晶体结构的温度可控光学膜系设计

The Design of Temperature Tunable Optical Film System Based on 1D Photonic Crystal Structure

采用热致相变材料VO2作为缺陷层,ZnS与MgF2作为周期性排列材料,设计了一种基于一维光子晶体结构的温度可控的光学膜系.由于VO2具有特殊的热致相变转换特性,光子禁带中的透射峰强度会因外界环境温度的改变而改变.所设计的一维光子晶体结构光学参数通过理论计算方法进行拟合,透射谱数据可根据传输矩阵法进行计算.研究结果表明,所设计结构具有良好的光学调节性能,在常温时的透射峰强度是高温状态下的40倍,并且透射峰位置可以根据入射角度的变化进行微调.所设计的基于一维光子晶体结构温度可控光学膜系具有较高的温度透射比、透射峰位置微调以及良好的双向温度调节性能.

A temperature tunable optical film system is studied using a one-dimensional photonic crystal （1D PC） structure with thermal hysteresis phase transformation VO2 material as a defect layer,and ZnS / MgF2 materials as periodical layers. Because of the special thermo-optical transition properties of VO2, the transmittance peak located in photonic band-gap can be modulated by changing the external temperature. The optical parameters of materials for 1D PC with VO2 defect layer are analyzed with theoretical fitting, and the transmission spectrum data of the structure is calculated by transfer matrix method. The transmittance peak intensity of 1D PC in low-temperature is 40 times as high as it in high- temperature, which reflected a good switch property, and the location of transmittance peak should be revised slightly through switching the incident angle. This 1D PC structure possesses many features with temperature changes such as high transmission radio, regulation of peak shifting and excellent bistable states transition.