Directional surface plasmon polariton scattering using single magnetic nanoparticles

被引：0

作者：

Sun, Xuqing ^{[1
,2
]}

Wang, Fei ^{[1
,2
]}

Sun, Xiaojuan ^{[1
,2
]}

Wang, Xue ^{[1
,2
]}

Cao, Yitao ^{[1
,2
]}

Ding, Xiaoxi ^{[1
,2
]}

Dou, Yingjie ^{[1
,2
]}

Fang, Runze ^{[1
,2
]}

Wang, Chang ^{[1
,2
]}

Liu, Hongyao ^{[1
]}

Lu, Xinchao ^{[1
]}

Gao, Hang ^{[1
]}

Huang, Chengjun ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Microelect, Beijing 100029, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

OPTICS LETTERS | 2024年 / 49卷 / 12期

基金：

中国国家自然科学基金;

关键词：

HIGH-EFFICIENCY; EXCITATION; LIGHT; INTERFERENCE;

D O I：

10.1364/OL.523793

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Directional surface plasmon polaritons (SPPs) are expected to promote the energy efficiency of plasmonic devices, via limiting the energy in a given spatial domain. The directional scattering of dielectric nanoparticles induced by the interference between electric and magnetic responses presents a potential candidate for directional SPPs. Magnetic nanoparticles can introduce permeability as an extra manipulation, whose directional scattered SPPs have not been investigated yet. In this work, we demonstrated the directional scattered SPPs by using single magnetic nanoparticles via simulation and experiment. By increasing the permeability and particle size, the high-order TEM modes are excited inside the particle and induce more forward directional SPPs. It indicated that the particle size manifests larger tuning range compared with the permeability. Experimentally, the maximum forward-to-backward (F-to-B) SPP scattering intensity ratio of 118.52:1 is visualized by using a single 1 mu m Fe 3 O 4 magnetic nanoparticle. The directional scattered SPPs of magnetic nanoparticles are hopeful to improve the efficiency of plasmonic devices and pave the way for plasmonic circuits on-chip. (c) 2024 Optica Publishing Group

引用

页码：3408 / 3411

页数：4

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