具有C4v对称性的石墨烯圆盘谐振器方阵中模式的杂化、简并和偏振无关性
Hybridization, degeneracy and polarization independence of modes in square array of graphene disk resonators with symmetry C4v
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中文总结 AI 辅助
研究C4v对称石墨烯圆盘方阵中模式杂化与简并，发现P/p0=2时模式对偏振无关，暗模式需破缺对称性激发，分离后可由正交偏振光激发。
中文摘要 AI 辅助
我们考虑一个在正方形晶胞中的无限石墨烯圆盘阵列，其中四聚体的每个圆盘都在偶极子区域被激发。讨论了属于C4v对称点群的不同不可约表示（IRREP）的等离激元本征模式的杂化。结果表明，在该对称性下，一对一维不可约表示模式A1和B2以及一对A2和B1的杂化可以存在。对于晶胞周期p0和四聚体周期P，关系P/p0 = 2定义了这些模式对的偏振无关性。所讨论的模式是暗模式，需要打破四聚体的点对称性才能激发它们，并且为了打破它们的简并性，即分离成两对，需要修改离散平移对称性，即改变参数P/p0。分离后的模式可以被正交偏振的正入射平面波激发。
英文摘要
We consider an infinite array of graphene disks in a square unit cell, where every disk of the quadrumer is excited in the dipole regime. Hybridization of plasmonic eigenmodes belonging to different IRREPs of the point group of symmetry C4v is discussed. It is shown that the hybridization of the pair of 1D IRREPs modes A1 and B2 as well as the pair A2 and B1 can exist in this symmetry. For the cell period p0 and the quadrumer period P, the relation P/p0 = 2 defines polarization independence of these pairs of modes. The discussed modes are dark ones and require for their excitation breaking the point symmetry of the quadrumer and, for breaking their degeneracy, i.e. separation in the two pairs, a modification of the discrete translation symmetry, i.e. change the parameter P/p0. The separated modes can be excited by normally incident plane wave with orthogonal polarizations.
发表机构
- Faculty of Electrical and Biomedical Engineering, Institute of Technology, Federal University of Pará（帕拉联邦大学电气与生物医学工程学院理工学院）
机构由 AI 辅助整理，请以论文原文为准。
