TE振荡模在左手材料劈形平面波导中的传输  

Propagation of TE Oscillating Guided Modes in a Taper Slab Waveguide with Metamaterials

作　　者：沈陆发[1] 谢建平[1] 王子华[2] Shen Lufa;Xie Jianping;Wang Zihua(School of Science, Huzhou University, Huzhou, Zhejiang 313000, China;School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China)

机构地区：[1]湖州师范学院理学院,浙江湖州313000 [2]上海大学通信与信息工程学院,上海200072

出　　处：《激光与光电子学进展》2018年第4期235-241,共7页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61275070);浙江省自然科学基金(LY15A040003);湖州师范学院教改项目(JY21087)

摘　　要：对含各向异性左手材料劈形平面波导中的TE振荡模进行了相关研究。从Maxwell方程组出发,采用变量分离法,根据切向电磁场连续的边界条件,得到该模的色散方程以及功率流方程。基于上述方程,采用曲线拟合方法,画出了相关的特性曲线。结果显示:电场强度同时考虑了x和z方向的影响,功率流随波导长度增加而周期性振荡变化;当劈形平面波导的斜率k=0.1,导模传输的波导长度小于2.5mm;当频率较低时(f=5.0GHz)以及k=0.01,对于不同的模阶数,波导厚度的变化对功率流在波导中传输的影响不大。这些特性将有助于未来波导的小型化以及波导加工精度的降低。The TE oscillating guided modes and their propagation properties in a taper slab waveguide with anisotropic metamaterials are investigated. From Maxwell equations, based on continuous boundary conditions for tangential electromagnetic fields, we obtain a dispersive equation and a power flow equation of TE oscillating guided modes with a variable separation method. Based on the above equations, using a curve fitting technique, we plot some corresponding curves. It is found that the electric field intensity considers the influence of x and z directions, and the power flow changes periodically with the increase of the waveguide length; as the slope of the taper slab waveguide k= 0.1, the waveguide length of the guided mode transmission is less than 2.5 mm; as lower frequencies （f=5.0 GHz） and k ：0.01, for different mode orders, the variation of waveguide thickness has little effect on power flow transmission. The properties will help us to minimize the waveguide and decrease the accuracy requirement of the waveguide processing in the future.

关 键 词：集成光学 平面波导 各向异性左手材料 色散曲线 归一化功率流 

分 类 号：TN252[电子电信—物理电子学]