中国物理B ›› 2019, Vol. 28 ›› Issue (8): 83302-083302.doi: 10.1088/1674-1056/28/8/083302

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

Surface plasmon polaritons generated magneto-optical Kerr reversal in nanograting

Le-Yi Chen(陈乐易), Zhen-Xing Zong(宗振兴), Jin-Long Gao(高锦龙), Shao-Long Tang(唐少龙), You-Wei Du(都有为)   

  1. 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;
    2 Department of Physics, School of Biomedical Engineering and Informatics, Nanjing Medical University, Nanjing 211166, China
  • 收稿日期:2019-04-18 修回日期:2019-05-17 出版日期:2019-08-05 发布日期:2019-08-05
  • 通讯作者: Shao-Long Tang E-mail:tangsl@nju.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant No. 11374146), the China Postdoctoral Science Foundation (Grant No. 2018M632278), and the Jiangsu Provincial Planned Projects for Postdoctoral Research Funds, China (Grant No. 1701092C).

Surface plasmon polaritons generated magneto-optical Kerr reversal in nanograting

Le-Yi Chen(陈乐易)1,2, Zhen-Xing Zong(宗振兴)1, Jin-Long Gao(高锦龙)1, Shao-Long Tang(唐少龙)1, You-Wei Du(都有为)1   

  1. 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;
    2 Department of Physics, School of Biomedical Engineering and Informatics, Nanjing Medical University, Nanjing 211166, China
  • Received:2019-04-18 Revised:2019-05-17 Online:2019-08-05 Published:2019-08-05
  • Contact: Shao-Long Tang E-mail:tangsl@nju.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant No. 11374146), the China Postdoctoral Science Foundation (Grant No. 2018M632278), and the Jiangsu Provincial Planned Projects for Postdoctoral Research Funds, China (Grant No. 1701092C).

摘要:

Controlling the phase of light in magnetoplasmonic structures is receiving increasing attention because of its already shown capability in ultrasensitive and label-free molecular-level detection. Magneto-optical Kerr reversal has been achieved and well explained in nanodisks by using the phase of localized plasmons. In this paper, we report that the Kerr reversal can also be produced by surface plasmon polaritons independently. We experimentally confirm this in Co and Ag/Co/Ag metal nanogratings, and can give a qualitative explanation that it is the charge accumulation at the interface between the grating surface and air that acts as the electromagnetic restoring force to contribute necessary additional phase for Kerr reversal. Our finding can enrich the means of designing and fabricating magneto-optical-based biochemical sensors.

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

Abstract:

Controlling the phase of light in magnetoplasmonic structures is receiving increasing attention because of its already shown capability in ultrasensitive and label-free molecular-level detection. Magneto-optical Kerr reversal has been achieved and well explained in nanodisks by using the phase of localized plasmons. In this paper, we report that the Kerr reversal can also be produced by surface plasmon polaritons independently. We experimentally confirm this in Co and Ag/Co/Ag metal nanogratings, and can give a qualitative explanation that it is the charge accumulation at the interface between the grating surface and air that acts as the electromagnetic restoring force to contribute necessary additional phase for Kerr reversal. Our finding can enrich the means of designing and fabricating magneto-optical-based biochemical sensors.

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)