Optical sensing based on multimode Fano resonances in MIM waveguide system with X-shaped resonant cavities

Abstract A plasmonic structure of metal-insulator-metal (MIM) waveguide consisting of a single baffle waveguide and an r-shaped resonator is designed to produce Fano resonance. The finite element method uses the finite element method to analyze the transmission characteristics and magnetic field distributions of the plasmonic waveguide distributions. The simulation results exhibit two Fano resonances that can be achieved by the interference between a continuum state in the baffle waveguide and a discrete state in the r-shaped resonator. The Fano resonances can be simply tuned by changing geometrical parameters of the plasmonic structure. The value variations of geometrical parameters have different effects on sensitivity. Thus, the sensitivity of the plasmonic structure can achieve 1333 nm/RIU, with a figure of merit of 5876. The results of the designed plasmonic structure offer high sensitivity and nano-scale integration, which are beneficial to refractive index sensors, photonic devices at the chip nano-sensors, and biosensors applications.

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Sensor based on multiple Fano resonances in MIM waveguide resonator system with silver nanorod-defect

Optik ◽

10.1016/j.ijleo.2020.166237 ◽

2021 ◽

Vol 229 ◽

pp. 166237

Author(s):

Fei Hu ◽

Fang Chen ◽

Huafeng Zhang ◽

Lihui Sun ◽

Chunchao Yu

Keyword(s):

Fano Resonances ◽

Waveguide Resonator ◽

Resonator System ◽

Mim Waveguide

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Refractive Index Sensing Based on Multiple Fano Resonances in a Split-Ring Cavity-Coupled MIM Waveguide

Photonics ◽

10.3390/photonics8110472 ◽

2021 ◽

Vol 8 (11) ◽

pp. 472

Author(s):

Jianfeng Chen ◽

Hao Yang ◽

Zhiyuan Fang ◽

Ming Zhao ◽

Chenbo Xie

Keyword(s):

Ring Cavity ◽

Wide Band ◽

Fano Resonances ◽

The Finite Element Method ◽

Split Ring ◽

Discrete State ◽

Continuous State ◽

Metal Insulator Metal ◽

Potential Applications ◽

Mim Waveguide

A metal–insulator–metal (MIM) waveguide consisting of a circular split-ring resonance cavity (CSRRC) and a double symmetric rectangular stub waveguide (DSRSW) is designed, which can excite quadruple Fano resonances. The finite element method (FEM) is used to investigate influences of geometric parameters on the transmission characteristics of the structure. The results show that Fano resonances are excited by the interference between the DSRSW and the CSRRC. Among them, the resonance wavelengths of the Fano resonances are tuned by the narrow-band discrete state excited by the CSRRC, and the resonance line transmittance and profiles are tuned by the wide-band continuous state excited by the DSRSW. The sensitivity (S) can be up to 1328.8 nm/RIU, and the figure of merit (FOM) can be up to 4.80 × 104. Based on these advantages, the structure has potential applications in sensing in the sub-wavelength range.

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Highly sensitive plasmonic temperature sensor based on Fano resonances in MIM waveguide coupled with defective oval resonator

Optical and Quantum Electronics ◽

10.1007/s11082-021-03088-3 ◽

2021 ◽

Vol 53 (8) ◽

Author(s):

Ahlam Harhouz ◽

Abdesselam Hocini

Keyword(s):

Temperature Sensor ◽

Fano Resonances ◽

Highly Sensitive ◽

Mim Waveguide

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Fano Resonances in Corrugated Ring coupled Bragg Waveguide System

10.1109/cleo/europe-eqec52157.2021.9542060 ◽

2021 ◽

Author(s):

Pravin Rawat ◽

Viphretuo Mere ◽

Shankar Kumar Selvaraja

Keyword(s):

Fano Resonances ◽

Waveguide System ◽

Bragg Waveguide

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Super High Sensitivity Plasmonic Temperature Sensor Based on Square Ring Shape Resonator with Nanorods Defects

10.21203/rs.3.rs-1042961/v1 ◽

2021 ◽

Author(s):

Ji Pan ◽

Shi Qianhan ◽

Zheng Ling ◽

Wang guanghui ◽

chen fang

Keyword(s):

Refractive Index ◽

Temperature Sensor ◽

High Sensitivity ◽

Transmission Characteristics ◽

Ring Shape ◽

Resonant Modes ◽

Metal Insulator Metal ◽

Waveguide System ◽

Difference Time ◽

Mim Waveguide

Abstract A super high sensitivity plasmonic temperature sensor via a metal-insulator-metal (MIM) waveguide system is presented in this paper, the waveguide structure is composed of a square ring shape resonator with nanorods defects and a nanodisk resonator. Finite difference-time domain method (FDTD) is used to study the structure’s transmission characteristics and electromagnetic field distributions. Results show that sensitivity will be increased due to the gap plasmonic in the nanorod defect, the nanodisk resonator provides more plasmonic resonant modes for sensing. The positions and intensities of plasmonic resonant modes can be tuned by the radius of nanorod defects and coupling distance. The calculated maximum refractive index and FOM are and 3500, respectively. Compared to the structure without nanorods, the sensitivity is enhanced 33% for mode 1. For temperature sensing, the proposed structure possesses a relatively high sensitivity of about . The proposed plasmonic structure provides a basis for designing high sensitivity nano-biosensing, refractive index sensing.

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