电磁波在负折射材料填充的3层平板波导中的传播特性  

Propagation characteristics of electromagnetic wave in slab waveguide filled with negative refraction index material

作　　者：柯尊淦[1] 吴少平[1] 郑丹[1] 

机构地区：[1]华中师范大学物理学院,湖北武汉430079

出　　处：《应用光学》2008年第5期825-829,共5页Journal of Applied Optics

摘　　要：从电磁场理论出发对负折射材料填充的3层平板波导的传播特性进行研究,并进行了数值计算,分析TE和TM波在平板中传播的性质,得到了电磁波的模式方程,与电磁波在右手材料填充的平板波导中的传播特性做了对比,考察了TE模式的能流密度,进行了归一化计算。结果分析表明:基模、一阶模不存在,且任何模式都存在一个截止厚度,随着厚度的增大,模式数量也增多;在一定的入射频率下,平板薄膜厚度趋向一定数值时,可以同时传播多种模式的波,并且入射波频率越高,波导同时存在多种模式的可能性越大;与右手材料相比,左手材料填充相同尺寸的3层平板波导可以传播更高能量的电磁波,导波效果更好。The propagation characteristics of the electromagnetic wave in three-layer slab waveguides filled With negative refraction index materials was studied and numerically calculated according to Maxwell theory. The propagation properties of TE and TM waves in the flat plate was analyzed, the mode equations were derived. The propagation characteristics of the electromagnetic wave in the slab waveguide filled with right-hand material were compared with the above mentioned propagation characteristics. And the energy-flow density of the TE mode was investigated. The results show that the base mode and the single mode do not exist, and every mode has a cut-off thickness. The quantity of the modes increases with the increase of the thickness. It is found that the slab waveguide can transmit more modes simultaneously at a specific thickness, and the higher the incident frequency is, the higher possibility of more modes in the slab waveguide. The slab waveguide filled with left-hand material can transmit more energy than the waveguide filled with right-hand material.

关 键 词：负折射材料 3层平板波导 传输特性 电磁波传播模式 

分 类 号：O43[机械工程—光学工程]