发表机构
M. V. Lomonosov Moscow State University; Moscow Center for Advanced Studies(莫斯科罗蒙诺索夫国立大学; 莫斯科高等研究中心)
机构由 AI 辅助整理,请以论文原文为准。AI 中文总结
本文研究等离子体光散射中表面钉扎的拓扑荷非奇异缺陷,证明其源于麦克斯韦边界条件且纯拓扑,并揭示圆柱体精确解中的拓扑荷守恒分岔及损耗导致的缺陷收缩。
AI 中文摘要
我们讨论了等离子体纳米结构光散射中表面钉扎的、带拓扑荷的非奇异缺陷(SD)。这些缺陷源于精确的麦克斯韦边界条件,且纯属拓扑性质——不受表面力的影响。在光学频率下,在(准)二维情形中,它们出现在$H^{(z)}$偏振(而非$E^{(z)}$偏振)的电场和坡印廷矢量场中。针对圆柱体的精确解揭示了涉及SD与体奇异点或仅涉及SD的拓扑荷守恒分岔,以及损耗下缺陷区域的收缩。
英文摘要
We discuss surface-pinned, topologically charged, nonsingular defects (SD) in light scattering by a plasmonic object. They follow from exact Maxwell boundary conditions and are purely topological---unaffected by surface forces. At optical frequencies, in (quasi) 2D, they appear in the electric and Poynting vector fields for $H^{(z)}$ polarization, not for $E^{(z)}$. Exact solutions for a circular cylinder reveal topological charge-conserving bifurcations involving SDs with bulk singularities or SDs alone, and contraction of defect regions under loss.
Comments4 pages, 4 figures, 2 Supplemental Materials