中国物理B ›› 2015, Vol. 24 ›› Issue (5): 57301-057301.doi: 10.1088/1674-1056/24/5/057301

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Modified method of surface plasmons in metal superlattices

张宇亮a, 王选章b   

  1. a Department of Physics, Harbin Institute of Technology, Harbin 150001, China;
    b Key Laboratory for Photonic and Electronic Bandgap Materials, the State Ministry of Education, and School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China
  • 收稿日期:2014-08-28 修回日期:2014-12-24 出版日期:2015-05-05 发布日期:2015-05-05
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11074061).

Modified method of surface plasmons in metal superlattices

Zhang Yu-Liang (张宇亮)a, Wang Xuan-Zhang (王选章)b   

  1. a Department of Physics, Harbin Institute of Technology, Harbin 150001, China;
    b Key Laboratory for Photonic and Electronic Bandgap Materials, the State Ministry of Education, and School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China
  • Received:2014-08-28 Revised:2014-12-24 Online:2015-05-05 Published:2015-05-05
  • Contact: Wang Xuan-Zhang E-mail:xzwang696@126.com
  • About author:73.20.Mf; 73.21.Cd; 78.67.Pt; 42.70.Qs
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11074061).

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摘要： We present a modified method to solve the surface plasmons (SPs) of semi-infinite metal/dielectric superlattices and predicted new SP modes in physics. We find that four dispersion-equation sets and all possible SP modes are determined by them. Our analysis and numerical calculations indicate that besides the SP mode obtained in the original theory, the other two SP modes are predicted, which have either a positive group velocity or a negative group velocity. We also point out the possible defect in the previous theoretical method in accordance to the linear algebra principle.

关键词: surface plasmon, dispersion equations, metal-layer arrays, metal/dielectric superlattices

Abstract: We present a modified method to solve the surface plasmons (SPs) of semi-infinite metal/dielectric superlattices and predicted new SP modes in physics. We find that four dispersion-equation sets and all possible SP modes are determined by them. Our analysis and numerical calculations indicate that besides the SP mode obtained in the original theory, the other two SP modes are predicted, which have either a positive group velocity or a negative group velocity. We also point out the possible defect in the previous theoretical method in accordance to the linear algebra principle.

Key words: surface plasmon, dispersion equations, metal-layer arrays, metal/dielectric superlattices

中图分类号:  (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))

  • 73.20.Mf
73.21.Cd (Superlattices) 78.67.Pt (Multilayers; superlattices; photonic structures; metamaterials) 42.70.Qs (Photonic bandgap materials)