arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.09510physics.optics
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偶极粒子平面阵列的耦合电和磁偶极表述:每单元具有各种电和/或磁元原子的元表面

Coupled electric and magnetic dipole formulation for planar arrays of dipolar particles: metasurfaces with various electric and/or magnetic meta-atoms per unit cell

Diego Romero Abujetas, Jorge Olmos-Trigo, Juan José Sáenz, José A. Sánchez-Gil

摘要:

散射粒子、超表面和超聚集体的无限平面阵列的光学性质最近因其丰富的现象学而引起特别的关注,包括具有各种电和磁共振响应的等离子体和高折射率介电超原子。在这里,我们推导出一个耦合电和磁偶极子(CEMD)的分析公式来描述这种周期性阵列的反射和透射,包括镜面和衍射订单,有效的光谱制度,只需要偶极多极。电和/或磁偶极子与所有三个方向依次从一个或多个元原子每单元电池被认为是。二维格点格林函数被重写为完全收敛且易于计算的一维(链)版本。作为这种晶格格林函数的极点出现的模式可以被提取。该公式可应用于研究在整个电磁波谱中感兴趣的大量等离子体、全介电和混合超颖表面/超颖聚集。

英文摘要:

The optical properties of infinite planar array of scattering particles, metasurfaces and metagratings, are attracting special attention lately for their rich phenomenology, including both plasmonic and high-refractive-index dielectric meta-atoms with a variety of electric and magnetic resonant responses. Herein we derive a coupled electric and magnetic dipole (CEMD) analytical formulation to describe the reflection and transmission of such periodic arrays, including specular and diffractive orders, valid in the spectral regimes where only dipolar multipoles are needed. Electric and/or magnetic dipoles with all three orientations arising in turn from a single or various meta-atoms per unit cell are considered. The 2D lattice Green function is rewritten in terms of a 1D (chain) version that fully converges and can be easily calculated. Modes emerging as poles of such lattice Green function can be extracted. This formulation can be applied to investigate a wealth of plasmonic, all-dielectric, and hybrid metasurfaces/metagratings of interest throughout the electromagnetic spectrum.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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