平衡和最佳双各向异性粒子：最大化从电磁场提取的功率
Balanced and optimal bianisotropic particles: Maximizing power extracted from electromagnetic fields
摘要：
在这里，我们介绍了"最佳粒子"的概念，与电磁场的强相互作用。我们假设一个粒子在空间中占据一个给定的电小体积，并研究粒子极化率之间所需的最佳关系。在这些最佳粒子中，选择包含体形状和材料，使得粒子从给定的入射场提取最大可能的功率。看来，对于不同的激发方案的最佳粒子是双各向异性手性，欧米茄，移动，Tellegen粒子。解析地找到了共振正则手征粒子和Ω粒子的最佳尺寸。这种最佳粒子具有极端的散射特性（例如，零反向散射或不可见性）。最佳颗粒的平面阵列在反射和透射方面具有极端的性质（例如，总吸收或磁壁共振）和最佳颗粒的体积复合物实现了例如诸如手性虚无介质的极端材料。
英文摘要：
Here we introduce the concept of "optimal particles" for strong interactions with electromagnetic fields. We assume that a particle occupies a given electrically small volume in space and study the required optimal relations between the particle polarizabilities. In these optimal particles, the inclusion shape and material are chosen so that the particles extract the maximum possible power from given incident fields. It appears that for different excitation scenarios the optimal particles are bianisotropic chiral, omega, moving, and Tellegen particles. The optimal dimensions of the resonance canonical chiral and omega particles are found analytically. Such optimal particles have extreme properties in scattering (for example, zero backscattering or invisibility). Planar arrays of optimal particles possess extreme properties in reflection and transmission (e.g., total absorption or magnetic-wall resonance), and volumetric composites of optimal particles realize, for example, such extreme materials as the chiral nihility medium.
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