Optimization of the Fano Resonance Lineshape Based on Graphene Plasmonic Hexamer in Mid-Infrared Frequencies

Junbo Ren; Guangqing Wang; Weibin Qiu; Zhili Lin; Houbo Chen; Pingping Qiu; Jia-Xian Wang; Qiang Kan; Jiao-Qing Pan

doi:10.3390/nano7090238

Optimization of the Fano Resonance Lineshape Based on Graphene Plasmonic Hexamer in Mid-Infrared Frequencies

Nanomaterials (Basel). 2017 Aug 26;7(9):238. doi: 10.3390/nano7090238.

Authors

Junbo Ren¹, Guangqing Wang², Weibin Qiu³, Zhili Lin⁴, Houbo Chen⁵, Pingping Qiu⁶, Jia-Xian Wang⁷, Qiang Kan^{8

9}, Jiao-Qing Pan^{10

11}

Affiliations

¹ Fujian Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China. 1611301026@hqu.edu.cn.
² Fujian Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China. wgq@hqu.edu.cn.
³ Fujian Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China. wbqiu@hqu.edu.cn.
⁴ Fujian Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China. zllin@hqu.edu.cm.
⁵ Fujian Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China. 1400201017@hqu.edu.cn.
⁶ Fujian Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China. 1511301022@hqu.edu.cn.
⁷ Fujian Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China. wangjx@hqu.edu.cn.
⁸ College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100086, China. kanqiang@semi.ac.cn.
⁹ Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100086, China. kanqiang@semi.ac.cn.
¹⁰ College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100086, China. jqpan@semi.ac.cn.
¹¹ Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100086, China. jqpan@semi.ac.cn.

Abstract

In this article, the lineshape of Fano-like resonance of graphene plasmonic oligomers is investigated as a function of the parameters of the nanostructures, such as disk size, chemical potential and electron momentum relaxation time in mid-infrared frequencies. Also, the mechanism of the optimization is discussed. Furthermore, the environmental index sensing effect of the proposed structure is revealed, and a figure of merit of 25.58 is achieved with the optimized graphene oligomer. The proposed nanostructure could find applications in the fields of chemical or biochemical sensing.

Keywords: Fano resonance; graphene oligomer; sensing; subgroup decomposition; surface plasmon.