一维光子晶体液晶微谐振腔的温度特性

Temperature Properties of One Dimensional Photonic Crystal Liquid Crystal Micro-Cavity

在光子晶体中引入液晶缺陷,形成一维光子晶体液晶微谐振腔。用传输矩阵法研究了这种微谐振腔的温度特性,用E1液晶微谐振腔进行了模拟数值计算。计算结果表明,液晶微谐振腔的特性与温度和液晶分子排列密切相关;对于液晶排列沿平行介质表面的微谐振腔,当温度升高时缺陷峰波长向长波长方向漂移,半高宽度增大,品质因子减小;而液晶排列沿介质表面法向的微谐振腔的温度变化情况则相反;温度灵敏度和透射峰高度均随温度升高而增大。温度特性为非线性关系,并随温度接近液晶相变点而变化迅速,与现有的各向同性材料微谐振腔的温度特性不同。

The one dimensional photonic crystal liquid crystal micro-cavity are formed by introduce liquid crystal defect into photonic crystal. The temperature properties of the micro-cavity are discussed using the transfer matrix method, and calculated with the EI liquid crystal. The results show that the temperature properties of the liquid crystal micro-cavity are close with the temperature and liquid crystal molecular orders. The defect peak wavelength move into long wavelength, width of defect mode transmission peaks decrease, quality factor decrease for liquid crystal parallel medium surface as temperature increase, and reverse for liquid crystal perpendicular medium surface. The temperature sensitivity and transmission increase with temperature. Temperature properties is nonlinear, and increase rapid with close into the liquid crystal clear point, is different for the temperature properties of micro-cavity with isotropy materials.