Characteristics of multiple Fano resonances in waveguide-coupled surface plasmon resonance sensors based on waveguide theory

被引：68
|
作者：
Yang, Liu [1 ]
Wang, Jicheng [1 ,2 ]
Yang, Li-zhi [1 ]
Hu, Zheng-Da [1 ]
Wu, Xiaojun [3 ]
Zheng, Gaige [4 ]
机构：
[1] Jiangnan Univ, Jiangsu Prov Res Ctr Light Ind Optoelect Engn & T, Sch Sci, Wuxi 214122, Peoples R China
[2] Southeast Univ, State Key Lab Millimeter Waves, Nanjing 210096, Jiangsu, Peoples R China
[3] Jiangnan Univ, Sch IoT Engn, Wuxi 214122, Peoples R China
[4] Nanjing Univ Informat Sci & Technol, Sch Phys & Optoelect Engn, Jiangsu Key Lab Optoelect Detect Atmosphere & Oce, Nanjing 210044, Jiangsu, Peoples R China
来源：
SCIENTIFIC REPORTS | 2018年 / 8卷
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
ELECTROMAGNETICALLY INDUCED TRANSPARENCY; LINESHAPE; ANALOG;
D O I：
10.1038/s41598-018-20952-7
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
We observe and analyze multiple Fano resonances and the plasmon-induced transparency (PIT) arising from waveguidecoupled surface plasmon resonance in a metal-dielectric Kretschmann configuration. It is shown that the simulation results for designed structures agree well with those of the dispersion relation of waveguide theory. We demonstrate that the coupling between the surface plasmon polariton mode and multi-order planar waveguide modes leads to multiple Fano resonances and PIT. The obtained results show that the number of Fano resonances and the linewidth of resonances depend on two structural parameters, the Parylene C and SiO2 layers, respectively. For the sensing action of Fano resonance, the figure of merit for the sensitivity by intensity is estimated to be 44 times higher than that of conventional surface plasmon resonance sensors. Our research reveals the potential advantage of sensors with high sensitivity based on coupling between the SPP mode and multi-order PWG modes.
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页数：10
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