摘要
A novel nanostructure based on a simple metal-dielectric-metal(MDM)bus waveguide with sliver baffle as well as anE-shaped cavity is proposed to generate double Fano resonances arising from interference between broad continuousstate and narrow discrete state.The commercial software COMSOL based on finite element methods is used to explorethe Fano resonances properties and the senor properties of the system.According to the simulation results,it isdemonstrated that E-shaped cavity can generate two discrete states,and the continuous sate is constructed by loadingsliver baffle in bus waveguide.Moreover,it can be found that the Fano peak wavelengths and profiles can easily betuned via structural parameters.Interestingly,the independent control of the left Fano resonance(LFR)can be accomplished by changing horizontal cavity length of E-shaped cavity.Meanwhile,our proposed nanostructure has a highersensitivity of 1440 nm/RIU as well as a higher figure of merit(FOM)value approximately 5244.In conclusion,the proposed independently tunable Fano nanostructure may have a great promising in the fields of nanosensors,filtersand other optical devices.
作者
WEI Guodong
WANG Xiao
魏国东;王晓(School of Applied Science,Taiyuan University of Science and Technology,Taiyuan 030024,China;School of Computer Science and Technology,Taiyuan University of Science and Technology,Taiyuan 030024,China)
基金
supported by the National Natural Science Foundation of China(No.11847067)
the Natural Science Foundation of Shanxi Province(No.201801D221178)
the Science and Technology Innovation Project of Shanxi Higher Education(No.2019L0648)
