激光与光电子学进展, 2019, 56 (8): 081601, 网络出版: 2019-07-26
硅纳米十字架二聚体的单向性散射特性研究 下载: 1154次
Unidirectional Scattering Properties of Silicon Nanocross Dimer
材料 纳米天线 散射特性 磁热点 单向散射 materials nanoantennas scattering properties magnetic hotspots unidirectional scattering
摘要
以硅十字架二聚体纳米天线为研究对象,采用有限元法(FEM)系统研究其远场单向散射特性,利用多极分解的方法对其散射特性进行解释。通过分析纳米天线中不同共振模式的响应对散射特性的影响,发现这些共振模式的耦合作用导致了高介电材料硅十字架二聚体结构磁热点的产生和远场单向性散射,为实现远场单向性可控的纳米天线提供了坚实的理论基础。
Abstract
The far-field unidirectional scattering properties of silicon nanocross dimers are investigated systematically by the finite element method. The multipole decomposition method is used to explain the scattering properties of nanocross dimers. By the analysis of the effects of different resonance modes on the scattering properties of nanoantennas, it is found that the coupling of these resonance modes of silicon nanocross dimers leads to the formation of magnetic hotspots and the far-field unidirectional scattering. The adjustable optical properties of nanocross dimers may provide a solid theoretical foundation for achieving far-field unidirectional controllable nanoantennas.
张明, 吕靖薇, 杨琳, 许文静, 王建鑫, 刘超, 牟海维. 硅纳米十字架二聚体的单向性散射特性研究[J]. 激光与光电子学进展, 2019, 56(8): 081601. Ming Zhang, Jingwei Lü, Lin Yang, Wenjing Xu, Jianxin Wang, Chao Liu, Haiwei Mou. Unidirectional Scattering Properties of Silicon Nanocross Dimer[J]. Laser & Optoelectronics Progress, 2019, 56(8): 081601.