椭圆形异向介质波导的导模
Guided Modes of Elliptical Metamaterial Waveguides
摘要：
研究了导电磁波在开口椭圆形异向介质波导结构中的传播。波导包含负折射率介质芯，其中介电常数$ε$和磁导率$μ$在给定带宽上为负。这些结构的允许模式的频谱数值计算通过求解的色散关系，表示在Mathieu函数。通过探测参数空间的某些区域，我们发现有可能存在沿波导表面传输的极端局部化波。
英文摘要：
The propagation of guided electromagnetic waves in open elliptical metamaterial waveguide structures is investigated. The waveguide contains a negative-index media core, where the permittivity, $ε$ and permeability $μ$ are negative over a given bandwidth. The allowed mode spectrum for these structures is numerically calculated by solving a dispersion relation that is expressed in terms of Mathieu functions. By probing certain regions of parameter space, we find the possibility exists to have extremely localized waves that transmit along the surface of the waveguide.
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