中国光学2023，Vol.16Issue(1)：214-227,14.DOI:10.37188/CO.2022-0170
纳米环-七聚体金属-介电结构的多重Fano共振特性
Multiple Fano resonance properties of nanoring-heptamer metal-dielectric structures
摘要
Abstract
In order to achieve tunable multiple Fano resonance characteristics and design a refractive index sensor with high sensitivity,a nanoring-heptamer metal-dielectric composite nanoantenna structure is pro-posed,and the influencing factors and variation rules of its Fano resonance characteristics are studied by using the Finite Element Method(FEM).Researches show that Fano resonance characteristics of the hybrid nano-antenna is sensitive to the changes of the height,incident angle and internal gap.In addition,the elec-tric intensity and the Purcell factor(PF)under the excitation of the electric dipole source can reach 134.74 V/m and 3214 respectively,which greatly enhances the electric intensity near the center of the nanoantenna.The hybrid nanoantenna has high Sensitivity(S)(1400 nm/RIU)and Figure of Merit(FOM)(17 RIU-1),respectively,which can be used as two significant performance indices for evaluating the refract-ive index sensor with high sensitivity.This paper provides a feasible way to realize the tunability of Fano res-onance in the composite nanoantenna and a solid theoretical basis for practical applications such as surface-enhanced Raman scattering,quantum emitters,and refractive index sensors.关键词
纳米天线/折射率传感器/Fano共振/近场增强Key words
nanoantenna/refractive index sensor/Fano resonance/near-field enhancement分类
数理科学引用本文复制引用
吕靖薇,王德宝,刘超,刘强,王建鑫,杨琳,牟海维,朱剑豪..纳米环-七聚体金属-介电结构的多重Fano共振特性[J].中国光学,2023,16(1):214-227,14.基金项目
黑龙江省自然科学基金资助项目(No.LH2021F007) （No.LH2021F007）
中国博士后科学基金资助项目(No.2020M670881) （No.2020M670881）
黑龙江省留学归国人员择优资助基金(No.070-719900103) （No.070-719900103）
东北石油大学科研启动项目(No.2019KQ74) （No.2019KQ74）
香港城市大学战略研究基金(SRG)(No.7005505)Supported by Natural Science Foundation Projects in Heilongjiang Province(No.LH2021F007) （SRG）
China Postdoctoral Science Foundation(No.2020M670881) （No.2020M670881）
Study Abroad returnees merit-based Aid Foundation in Heilongjiang Province(No.070-719900103) （No.070-719900103）
Northeastern Petroleum University Scientific Research Projects(No.2019KQ74) （No.2019KQ74）
Strategic Research Fund of the City University of Hong Kong(SRG)(No.7005505) （SRG）
