中国物理B ›› 2016, Vol. 25 ›› Issue (5): 57303-057303.doi: 10.1088/1674-1056/25/5/057303
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
Tunable Fano resonances and plasmonic hybridization of gold triangle-rod dimer nanostructure
Meng Huang(黄萌), Dong Chen(陈栋), Li Zhang(张利), Jun Zhou(周骏)
- 1. College of Electrical and Information Engineering, Quzhou University, Quzhou 324000, China;
2. Institute of Photonics, Faculty of Science, Ningbo University, Ningbo 315211, China
Tunable Fano resonances and plasmonic hybridization of gold triangle-rod dimer nanostructure
Meng Huang(黄萌)1, Dong Chen(陈栋)2, Li Zhang(张利)2, Jun Zhou(周骏)2
- 1. College of Electrical and Information Engineering, Quzhou University, Quzhou 324000, China;
2. Institute of Photonics, Faculty of Science, Ningbo University, Ningbo 315211, China
摘要： A gold dimer structure consisting of a notched triangle nanoslice and a rectangle nanorod is proposed to produce distinct Fano resonance. Owing to the coupling between the dipole plasmon mode of the nanorod and the dipole or quadrupole plasmon mode of the nanoslice, the extinction spectrum with a deep Fano dip is formed and can be well fitted by the Fano interference model for different geometry parameters. In addition, Fano resonance of the gold dimer nanostructure also intensely depends on the polarization direction of incident light. Moreover, Fano resonance of the triangle-rod trimer is also analyzed by adding another nanorod into the former dimer and exhibits the splitting of plasmonic resonant peak in high order coupling modes. The plasmonic hybridizations in these nanostructures have been analyzed for revealing the physical origin of the Fano resonance.
中图分类号: (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
- 73.20.Mf