中国物理B ›› 2016, Vol. 25 ›› Issue (11): 113301-113301.doi: 10.1088/1674-1056/25/11/113301

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

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

Le-Yi Chen(陈乐易), Zhi-Xiong Tang(唐志雄), Jin-Long Gao(高锦龙), Dao-Yong Li(李道勇), Cheng-Xin Lei(类成新), Zhen-Zhi Cheng(程振之), Shao-Long Tang(唐少龙), You-Wei Du(都有为)   

  1. Collaborative Innovation Center of Advanced Microstructures, Nanjing National Laboratory of Microstructures, Jiangsu Key Laboratory for Nanotechnology and Department of Physics, Nanjing University, Nanjing 210093, China
  • 收稿日期:2016-05-30 修回日期:2016-08-13 出版日期:2016-11-05 发布日期:2016-11-05
  • 通讯作者: Shao-Long Tang E-mail:tangsl@nju.edu.cn
  • 基金资助:

    Project supported by the National Key Project of Fundamental Research of China (Grant No. 2012CB932304) and the National Natural Science Foundation of China (Grant Nos. 11374146 and U1232210).

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

Le-Yi Chen(陈乐易), Zhi-Xiong Tang(唐志雄), Jin-Long Gao(高锦龙), Dao-Yong Li(李道勇), Cheng-Xin Lei(类成新), Zhen-Zhi Cheng(程振之), Shao-Long Tang(唐少龙), You-Wei Du(都有为)   

  1. Collaborative Innovation Center of Advanced Microstructures, Nanjing National Laboratory of Microstructures, Jiangsu Key Laboratory for Nanotechnology and Department of Physics, Nanjing University, Nanjing 210093, China
  • Received:2016-05-30 Revised:2016-08-13 Online:2016-11-05 Published:2016-11-05
  • Contact: Shao-Long Tang E-mail:tangsl@nju.edu.cn
  • Supported by:

    Project supported by the National Key Project of Fundamental Research of China (Grant No. 2012CB932304) and the National Natural Science Foundation of China (Grant Nos. 11374146 and U1232210).

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.

关键词: magneto-optics, surface plasmons, magnetoplasmonics, magneto-optical devices

Abstract:

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.

Key words: magneto-optics, surface plasmons, magnetoplasmonics, magneto-optical devices

中图分类号:  (Magneto-optical and electro-optical spectra and effects)

  • 33.57.+c
73.20.Mf (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)) 78.20.Ls (Magneto-optical effects) 85.70.Sq (Magnetooptical devices)