有限非均匀三维结构中电磁共振的分类
Classification of electromagnetic resonances in finite inhomogeneous three-dimensional structures
摘要：
我们提出了一个简单的和统一的分类宏观电磁谐振在有限的任意非均匀各向同性介质三维结构位于自由空间。通过观察作为角频率和本构参数的函数的体积积分算子的空间谱的复平面动力学，我们确定和概括所有常见的共振，包括复杂的等离子体激元，真正的激光共振介质中的增益，和真正的准静态共振介质中的负介电常数和增益。
英文摘要：
We present a simple and unified classification of macroscopic electromagnetic resonances in finite arbitrarily inhomogeneous isotropic dielectric 3D structures situated in free space. By observing the complex-plane dynamics of the spatial spectrum of the volume integral operator as a function of angular frequency and constitutive parameters we identify and generalize all the usual resonances, including complex plasmons, real laser resonances in media with gain, and real quasi-static resonances in media with negative permittivity and gain.
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