中国物理B ›› 2015, Vol. 24 ›› Issue (8): 87301-087301.doi: 10.1088/1674-1056/24/8/087301

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

Tunable multiple plasmon resonances and local field enhancement of nanocrescent/nanoring structure

王彬兵a, 周骏a, 陈栋a, 方云团b, 陈明阳c   

  1. a Institute of Photonics, Faculty of Science, Ningbo University, Ningbo 315211, China;
    b School of Computer Science and Telecommunication Engineering, Jiangsu University, Zhenjiang 212013, China;
    c School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China
  • 收稿日期:2015-01-20 修回日期:2015-03-02 出版日期:2015-08-05 发布日期:2015-08-05
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61275153 and 61320106014), the Natural Science Foundation of Zhejiang Province, China (Grant No. LY12A04002), the Natural Science Foundation of Ningbo City, China (Grant Nos. 2010D10018 and 2012A610107), and the K. C. Wong Magna Foundation of Ningbo University, China.

Tunable multiple plasmon resonances and local field enhancement of nanocrescent/nanoring structure

Wang Bin-Bing (王彬兵)a, Zhou Jun (周骏)a, Chen Dong (陈栋)a, Fang Yun-Tuan (方云团)b, Chen Ming-Yang (陈明阳)c   

  1. a Institute of Photonics, Faculty of Science, Ningbo University, Ningbo 315211, China;
    b School of Computer Science and Telecommunication Engineering, Jiangsu University, Zhenjiang 212013, China;
    c School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China
  • Received:2015-01-20 Revised:2015-03-02 Online:2015-08-05 Published:2015-08-05
  • Contact: Zhou Jun E-mail:zhoujun@nbu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61275153 and 61320106014), the Natural Science Foundation of Zhejiang Province, China (Grant No. LY12A04002), the Natural Science Foundation of Ningbo City, China (Grant Nos. 2010D10018 and 2012A610107), and the K. C. Wong Magna Foundation of Ningbo University, China.

摘要: According to the plasmon hybridization theory, the plasmon resonance characteristics of the gold nanocrescent/nanoring (NCNR) structure are systematically investigated by the finite element method. It is found that the extinction spectra of NCNR structure exhibit multiple plasmon resonance peaks, which could be attributed to the result of the plasmon couplings between the multipolar plasmon modes of nanocrescent and the dipolar, quadrupolar, hexapolar, octupolar, decapolar plasmon modes of nanoring. By changing the geometric parameters, the intense and separate multiple plasmon resonance peaks are obtained and can be tuned in a wide wavelength range. It is further found that the plasmon coupling induces giant multipole electric field enhancements around the tips of the nanocrescent. The tunable and intense multiple plasmon resonances of NCNR structure may provide effective applications in multiplex biological sensing.

关键词: localized surface plasmon resonance, field enhancement, coherent couplings, biological sensors

Abstract: According to the plasmon hybridization theory, the plasmon resonance characteristics of the gold nanocrescent/nanoring (NCNR) structure are systematically investigated by the finite element method. It is found that the extinction spectra of NCNR structure exhibit multiple plasmon resonance peaks, which could be attributed to the result of the plasmon couplings between the multipolar plasmon modes of nanocrescent and the dipolar, quadrupolar, hexapolar, octupolar, decapolar plasmon modes of nanoring. By changing the geometric parameters, the intense and separate multiple plasmon resonance peaks are obtained and can be tuned in a wide wavelength range. It is further found that the plasmon coupling induces giant multipole electric field enhancements around the tips of the nanocrescent. The tunable and intense multiple plasmon resonances of NCNR structure may provide effective applications in multiplex biological sensing.

Key words: localized surface plasmon resonance, field enhancement, coherent couplings, biological sensors

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

  • 73.20.Mf
52.35.Mw (Nonlinear phenomena: waves, wave propagation, and other interactions (including parametric effects, mode coupling, ponderomotive effects, etc.)) 87.85.fk (Biosensors)