Fano resonance and magneto-optical Kerr rotaion in periodic Co/Ni complex plasmonic nanostructure

被引：6
作者：
Chen, Le-Yi
Tang, Zhi-Xiong
Gao, Jin-Long
Li, Dao-Yong
Lei, Cheng-Xin
Cheng, Zhen-Zhi
Tang, Shao-Long [1 ]
Du, You-Wei
机构：
[1] Nanjing Univ, Jiangsu Key Lab Nanotechnol, Nanjing Natl Lab Microstruct, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China
来源：
CHINESE PHYSICS B | 2016年 / 25卷 / 11期
基金：
中国国家自然科学基金;
关键词：
magneto-optics; surface plasmons; magnetoplasmonics; magneto-optical devices; TRANSPARENCY; ARRAYS; FILM; CO;
D O I：
10.1088/1674-1056/25/11/113301
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report a pure ferromagnetic metallic magnetoplasmonic structure consisting of two-dimensional ordered Ni nanodisks array on Co film. With a sufficient height of the nanodisks, a steep and asymmetric Fano resonance can be excited in this structure. We attribute the fascinating spectral lineshape to the strong coupling between the excitation of surface plasmon polaritons at the interface and the localized surface plasmon resonance of nanodisks. The conclusion is fully confirmed by spectrum measurements in nanostructures with different heights. Furthermore, the enhancement and sign of the magneto-optical Kerr rotation in this structure are significantly modified by the Fano resonance.
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页数：5
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