Abstract The canonical boundary-value problem for the propagation of compound plasmon-polariton (CPP) waves, guided by a symmetric structure comprising a metal film embedded in a uniaxial dielectric material, was formulated and solved. In addition to unexceptional CPP waves whose field strength, in the dielectric material, decays exponentially with distance from the nearest dielectric/metal interface, this structure can also guide exceptional CPP waves whose fields, in the dielectric material, decay as the product of a linear function and an exponential function of distance from the nearest dielectric/metal interface. An explicit solution for exceptional CPP-wave propagation was derived and spatial field profiles for exceptional CPP waves were computed. At most, two exceptional CPP waves were found to propagate in two different directions within each quadrant of the interfacial plane.

中文翻译：

---

由嵌入单轴介电材料中的金属膜引导的特殊复合等离子体激元波

摘要 公式化并求解了由包含嵌入单轴介电材料的金属膜的对称结构引导的复合等离子体激元 (CPP) 波传播的规范边界值问题。除了在介电材料中场强随距离最近的电介质/金属界面的距离呈指数衰减的普通 CPP 波之外，这种结构还可以引导特殊的 CPP 波，其场在介电材料中衰减为线性的乘积函数和距离最近的电介质/金属界面的指数函数。导出了异常 CPP 波传播的显式解，并计算了异常 CPP 波的空间场分布。最多，