含色散左手材料非对称5层平板波导的模式特性

摘要

系统研究了含色散左手材料作为芯层的非对称5层平板波导TE波的传输特性,重点讨论了芯层色散、芯层厚度和覆盖层折射率对波导的影响,并与无色散5层平板波导做了比较.研究表明,导波和表面波都可以在这种波导中传播;TEo模只有表面波,TEm(m>1)模只有导波,TE1模既有导波又有表面波;TEm(m≥1)各模均存在双模现象.%Propagation properties of the TE mode for asymmetrical five-layer slab waveguide with lefthanded materials containing dispersion as core layer was studied. The influences on core layer's dispersion,thickness and cover refractive index for waveguide were concentrated. And the results were compared with five-layer slab waveguide with left-handed dispersionless material. The results prove that guided and surface waves can both propagate in the waveguide; TE0 mode only has surface waves, TEm (order m＞1) are guided waves, TE1 modes not only have guided modes, but also the surface modes, and there exist two-mode phenomena. In all TEm (order m≥1) modes exist two-mode phenomena.