论文标题
2D电磁平板波导中的边缘模式：声等离子体的类似物
Edge modes in 2D electromagnetic slab waveguides: analogues of acoustic plasmons
论文作者
论文摘要
我们分析了由两个完美的电导体形成的平板波导限制的平面电磁波。值得注意的是，描述此类波导中横向电磁模式的2D麦克斯韦方程式被精确映射到流体或气体中的声波方程式上。我们表明，具有相反镜头渗透率的两个平板波导之间的接口支持1D边缘模式，类似于具有相反质量密度的界面上的表面声质等离子体。我们为各向同性培养基和各向异性培养基（包括双曲介质）分析了这种新型的边缘模式。我们还考虑了具有想象频率或/和繁殖常数的“非热式”边缘模式。我们的理论预测对于涉及2D超材料的光学和微波实验是可行的。
We analyze planar electromagnetic waves confined by a slab waveguide formed by two perfect electrical conductors. Remarkably, 2D Maxwell equations describing transverse electromagnetic modes in such waveguides are exactly mapped onto equations for acoustic waves in fluids or gases. We show that interfaces between two slab waveguides with opposite-sign permeabilities support 1D edge modes, analogous to surface acoustic plasmons at interfaces with opposite-sign mass densities. We analyze this novel type of edge modes for the cases of isotropic media and anisotropic media with tensor permeabilities (including hyperbolic media). We also take into account `non-Hermitian' edge modes with imaginary frequencies or/and propagation constants. Our theoretical predictions are feasible for optical and microwave experiments involving 2D metamaterials.
