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硅纳米十字架二聚体的单向性散射特性研究

Unidirectional Scattering Properties of Silicon Nanocross Dimer

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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.

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中图分类号:O433.4

DOI:10.3788/lop56.081601

所属栏目:材料

基金项目:东北石油大学青年自然科学基金(NEPUQN2014-05)、国家自然科学基金(51474069,41472126)、中国博士后基金(2016M59150)、黑龙江省自然科学基金(E2016007,E2017010)、东北石油大学研究生创新科研项目(YJSCX2017-034NEPU)

收稿日期:2018-09-29

修改稿日期:2018-10-24

网络出版日期:2018-11-22

作者单位    点击查看

张明:东北石油大学电子科学学院, 黑龙江 大庆 163318
吕靖薇:东北石油大学电子科学学院, 黑龙江 大庆 163318
杨琳:东北石油大学电子科学学院, 黑龙江 大庆 163318
许文静:东北石油大学电子科学学院, 黑龙江 大庆 163318
王建鑫:东北石油大学电子科学学院, 黑龙江 大庆 163318
刘超:东北石油大学电子科学学院, 黑龙江 大庆 163318
牟海维:东北石油大学电子科学学院, 黑龙江 大庆 163318

联系人作者:张明(525882916@qq.com)

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引用该论文

Zhang Ming,Lü Jingwei,Yang Lin,Xu Wenjing,Wang Jianxin,Liu Chao,Mou Haiwei. Unidirectional Scattering Properties of Silicon Nanocross Dimer[J]. Laser & Optoelectronics Progress, 2019, 56(8): 081601

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

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