Switchable directional scattering based on spoof core—shell plasmonic structures

doi:10.1088/1674-1056/ac3503

中国物理B ›› 2022, Vol. 31 ›› Issue (5): 54101-054101.doi: 10.1088/1674-1056/ac3503

Switchable directional scattering based on spoof core—shell plasmonic structures

Yun-Qiao Yin(殷允桥), Hong-Wei Wu(吴宏伟), Shu-Ling Cheng(程淑玲), and Zong-Qiang Sheng(圣宗强)

School of Mechanics and Photoelectric Physics, Anhui University of Science and Technology, Huainan 232001, China

收稿日期:2021-09-28 修回日期:2021-10-21 出版日期:2022-05-14 发布日期:2022-04-27
通讯作者: Hong-Wei Wu,E-mail:hwwu@aust.edu.cn E-mail:hwwu@aust.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No.11904008),the Natural Science Foundation of Anhui Province,China (Grant No.1908085QA21),and the China Postdoctoral Science Foundation (Grant No.2019M662132).

Switchable directional scattering based on spoof core—shell plasmonic structures

Yun-Qiao Yin(殷允桥), Hong-Wei Wu(吴宏伟)^†, Shu-Ling Cheng(程淑玲), and Zong-Qiang Sheng(圣宗强)

School of Mechanics and Photoelectric Physics, Anhui University of Science and Technology, Huainan 232001, China

Received:2021-09-28 Revised:2021-10-21 Online:2022-05-14 Published:2022-04-27
Contact: Hong-Wei Wu,E-mail:hwwu@aust.edu.cn E-mail:hwwu@aust.edu.cn
About author:2021-11-1
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No.11904008),the Natural Science Foundation of Anhui Province,China (Grant No.1908085QA21),and the China Postdoctoral Science Foundation (Grant No.2019M662132).

摘要/Abstract

摘要： Manipulating directional electromagnetic scattering plays a crucial role in the realization of exotic optical phenomenon. Here, we show that the spoof plasmonic structure is able to achieve the switching of directional scattering direction on a subwavelength scale by inserting a perfect electric conductor (PEC) cylinder into the hollow of the spoof plasmonic structure. Based on the modal analysis, it is found that the electromagnetic response of the core-shell structure not only is well excited, but also exhibits the directional scattering by interference between the electric and magnetic dipolar resonances. We also discuss the influence of PEC cylinder radius on the performance of the directional scattering. Finally, the active tunable directional scattering is realized by switching between the two states. This work provides a feasible pathway to the subwavelength manipulation of electromagnetic wave. Moreover, it offers a simple method to switch the directional scattering direction. The proposed design approach can be easily applied to digital electromagnetic wave communication and associated applications.

关键词: spoof core-shell plasmonic structures, directional scattering, switchable direction

Abstract: Manipulating directional electromagnetic scattering plays a crucial role in the realization of exotic optical phenomenon. Here, we show that the spoof plasmonic structure is able to achieve the switching of directional scattering direction on a subwavelength scale by inserting a perfect electric conductor (PEC) cylinder into the hollow of the spoof plasmonic structure. Based on the modal analysis, it is found that the electromagnetic response of the core-shell structure not only is well excited, but also exhibits the directional scattering by interference between the electric and magnetic dipolar resonances. We also discuss the influence of PEC cylinder radius on the performance of the directional scattering. Finally, the active tunable directional scattering is realized by switching between the two states. This work provides a feasible pathway to the subwavelength manipulation of electromagnetic wave. Moreover, it offers a simple method to switch the directional scattering direction. The proposed design approach can be easily applied to digital electromagnetic wave communication and associated applications.

Key words: spoof core-shell plasmonic structures, directional scattering, switchable direction

中图分类号: (Electromagnetic wave propagation; radiowave propagation)

41.20.Jb

42.25.Bs (Wave propagation, transmission and absorption) 41.85.-p (Beam optics) 78.20.Bh (Theory, models, and numerical simulation)

Yun-Qiao Yin(殷允桥), Hong-Wei Wu(吴宏伟), Shu-Ling Cheng(程淑玲), and Zong-Qiang Sheng(圣宗强). Switchable directional scattering based on spoof core—shell plasmonic structures[J]. 中国物理B, 2022, 31(5): 54101-054101.

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Switchable directional scattering based on spoof core—shell plasmonic structures

Switchable directional scattering based on spoof core—shell plasmonic structures

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