中国物理B ›› 2016, Vol. 25 ›› Issue (5): 57803-057803.doi: 10.1088/1674-1056/25/5/057803

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

Broadband tunability of surface plasmon resonance in graphene-coating silica nanoparticles

Zhe Shi(史哲), Yang Yang(杨阳), Lin Gan(甘霖), Zhi-Yuan Li(李志远)   

  1. 1. Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2. Key Laboratory of Micro-nano Measurement-Manipulation and Physics (Ministry of Education), Department of Physics, Beihang University, Beijing 100191, China
  • 收稿日期:2016-01-22 出版日期:2016-05-05 发布日期:2016-05-05
  • 通讯作者: Zhi-Yuan Li E-mail:lizy@aphy.iphy.ac.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11204365 and 11434017) and the National Basic Research Program of China (Grant No. 2013CB632704).

Broadband tunability of surface plasmon resonance in graphene-coating silica nanoparticles

Zhe Shi(史哲)1, Yang Yang(杨阳)1,2, Lin Gan(甘霖)1, Zhi-Yuan Li(李志远)1   

  1. 1. Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2. Key Laboratory of Micro-nano Measurement-Manipulation and Physics (Ministry of Education), Department of Physics, Beihang University, Beijing 100191, China
  • Received:2016-01-22 Online:2016-05-05 Published:2016-05-05
  • Contact: Zhi-Yuan Li E-mail:lizy@aphy.iphy.ac.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11204365 and 11434017) and the National Basic Research Program of China (Grant No. 2013CB632704).

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摘要：

Graphene decorated nanomaterials and nanostructures can potentially be used in military and medical science applications. In this article, we study the optical properties of a graphene wrapping silica core-shell spherical nanoparticle under illumination of external light by using the Mie theory. We find that the nanoparticle can exhibit surface plasmon resonance (SPR) that can be broadly tuned from mid infrared to near infrared via simply changing the geometric parameters. A simplified equivalent dielectric permittivity model is developed to better understand the physics of SPR, and the calculation results agree well qualitatively with the rigorous Mie theory. Both calculations suggest that a small radius of graphene wrapping nanoparticle with high Fermi level could move the SPR wavelength of graphene into the near infrared regime.

关键词: graphene, core-shell nanoparticle, surface plasmon resonance

Abstract:

Graphene decorated nanomaterials and nanostructures can potentially be used in military and medical science applications. In this article, we study the optical properties of a graphene wrapping silica core-shell spherical nanoparticle under illumination of external light by using the Mie theory. We find that the nanoparticle can exhibit surface plasmon resonance (SPR) that can be broadly tuned from mid infrared to near infrared via simply changing the geometric parameters. A simplified equivalent dielectric permittivity model is developed to better understand the physics of SPR, and the calculation results agree well qualitatively with the rigorous Mie theory. Both calculations suggest that a small radius of graphene wrapping nanoparticle with high Fermi level could move the SPR wavelength of graphene into the near infrared regime.

Key words: graphene, core-shell nanoparticle, surface plasmon resonance

中图分类号:  (Optical properties of graphene)

  • 78.67.Wj
78.67.Bf (Nanocrystals, nanoparticles, and nanoclusters) 73.20.Mf (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))