High figure of merit refractive index nanosensor based on Fano resonances in waveguide

Abstract. Fano resonances based on circle-with-inner-core and stub structure are investigated using data derived from the finite element method and theoretically explained by the multimode interference coupled mode theory and the electric distribution in the system. The parameters of specific structure are modified to investigate the influence of different parts for this metal–insulator–metal system. Due to the high sensitivity to filled dielectric materials, the proposed structure can be applied as a refractive index sensor, whose performances are also explored. High sensitivity is gained as high as 1183.3  nm  /  RIU. And the figure of merit, a key parameter to describe the sensing characteristic, is achieved as 5.1115  ×  104, which is better than most similar structures. Our work is significant for the sensitive refractive index nanosensor.

[1]  Takashi Taniguchi,et al.  2D semiconductor nonlinear plasmonic modulators , 2019, Nature Communications.

[2]  Li Yu,et al.  Ultrasharp Fano Resonances Based on the Circular Cavity Optimized by a Metallic Nanodisk , 2016, IEEE Photonics Journal.

[3]  Li Yu,et al.  Multiple Fano Resonances Based on Different Waveguide Modes in a Symmetry Breaking Plasmonic System , 2014, IEEE Photonics Journal.

[4]  Li Yu,et al.  Multiple Fano Resonances Based on Plasmonic Resonator System With End-Coupled Cavities for High-Performance Nanosensor , 2017, IEEE Photonics Journal.

[5]  Li Yu,et al.  A Refractive Index Nanosensor Based on Fano Resonance in the Plasmonic Waveguide System , 2015, IEEE Photonics Technology Letters.

[6]  Chunman Yan,et al.  Refractive Index Sensor Based on Fano Resonances in Plasmonic Waveguide With Dual Side-Coupled Ring Resonators , 2018, Photonic Sensors.

[7]  Li Yu,et al.  Ultra-high Sensitivity Plasmonic Nanosensor Based on Multiple Fano Resonance in the MDM Side-Coupled Cavities , 2017, Plasmonics.

[8]  Xian-Shi Lin,et al.  Tooth-shaped plasmonic waveguide filters with nanometeric sizes. , 2008, Optics letters.

[9]  Li Yu,et al.  High sensitivity plasmonic sensing based on Fano interference in a rectangular ring waveguide , 2015 .

[10]  Yun Binfeng,et al.  Fano resonances in a plasmonic waveguide system composed of stub coupled with a square cavity resonator , 2016 .

[11]  U. Hohenester,et al.  The Optimal Aspect Ratio of Gold Nanorods for Plasmonic Bio-sensing , 2010 .

[12]  Xueming Liu,et al.  Plasmonic nanosensor based on Fano resonance in waveguide-coupled resonators. , 2012, Optics letters.

[13]  Li Yu,et al.  Side-Coupled Cavity-Induced Fano Resonance and Its Application in Nanosensor , 2016, Plasmonics.

[14]  Yundong Zhang,et al.  Fano resonances based on nanoscale plasmonic structure , 2016, NanoScience + Engineering.

[15]  Mohamed A. Swillam,et al.  Mid-Infrared Plasmonic Power Splitters , 2016, IEEE Photonics Technology Letters.

[16]  Jianquan Yao,et al.  Dynamically Tunable Graphene Plasmon-Induced Transparency in the Terahertz Region , 2016, Journal of Lightwave Technology.

[17]  Zhihui He,et al.  Theoretical analysis of ultrahigh figure of merit sensing in plasmonic waveguides with a multimode stub. , 2016, Optics letters.

[18]  Baile Zhang,et al.  Multi-directional plasmonic surface-wave splitters with full bandwidth isolation , 2016 .

[19]  K. Wen,et al.  Tunable Multimode Plasmonic Filter Based on Side-Coupled Ring-Groove Joint Resonator , 2017, Plasmonics.

[20]  Li Yu,et al.  Fano resonances based on multimode and degenerate mode interference in plasmonic resonator system. , 2017, Optics express.

[21]  L. Xiaofei,et al.  Sensing performance analysis on Fano resonance of metallic double-baffle contained MDM waveguide coupled ring resonator , 2018 .

[22]  Li Yu,et al.  Tunable triple Fano resonances based on multimode interference in coupled plasmonic resonator system. , 2016, Optics express.

[23]  Zhao Tong-gang,et al.  Fano resonance induced by stub and applied in nanosensor , 2018 .

[24]  Yuri S. Kivshar,et al.  Fano Resonances in Nanoscale Structures , 2010 .

[25]  Fang Chen.  Nanosensing and slow light application based on Fano resonance in waveguide coupled equilateral triangle resonator system , 2018, Optik.

[26]  Dafa Pan,et al.  Tuning Multiple Fano Resonances for On-Chip Sensors in a Plasmonic System , 2019, Sensors.

[27]  Zeyu Zhang,et al.  Electromagnetically Induced Transparency and Refractive Index Sensing for a Plasmonic Waveguide with a Stub Coupled Ring Resonator , 2017, Plasmonics.

[28]  Mohamed A. Swillam,et al.  Metal-less silicon plasmonic mid-infrared gas sensor , 2016 .

[29]  Yun Binfeng,et al.  Ultra Sharp Fano Resonances Induced by Coupling between Plasmonic Stub and Circular Cavity Resonators , 2016, Plasmonics.

[30]  E. Economou.  Surface Plasmons in Thin Films , 1969 .

[31]  Xiangang Luo,et al.  Plasmonic nanoresonators for high-resolution colour filtering and spectral imaging. , 2010, Nature communications.

[32]  H. Ming,et al.  PIT-like effect with high directivity in hybrid plasmonic array , 2016 .

[33]  K. Wen,et al.  Multiple fano resonances in an end-coupled MIM waveguide system , 2019 .

[34]  J. Aitchison,et al.  Analysis and Optimization of Hybrid Plasmonic Waveguide as a Platform for Biosensing , 2014, IEEE Photonics Journal.