Tunable Fano resonance and its application in refractive index sensor

2018 ◽  
Author(s):  
Xiao b. Ren ◽  
kun ren ◽  
Ying Zhang
Keyword(s):  
Refractive Index ◽  
Fano Resonance ◽  
Refractive Index Sensor

scholarly journals Improved Refractive Index-Sensing Performance of Multimode Fano-Resonance-Based Metal-Insulator-Metal Nanostructures

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2097
Author(s):  
Yuan-Fong Chou Chau ◽  
Chung-Ting Chou Chao ◽  
Siti Zubaidah Binti Haji Jumat ◽  
Muhammad Raziq Rahimi Kooh ◽  
Roshan Thotagamuge ◽  
...  
Keyword(s):  
Refractive Index ◽  
Plasmon Resonance ◽  
Fano Resonance ◽  
High Sensitivity ◽  
Metal Nanostructures ◽  
Refractive Index Sensor ◽  
Metal Insulator ◽  
Wide Range ◽  
Metal Insulator Metal ◽  
Mode 2

This work proposed a multiple mode Fano resonance-based refractive index sensor with high sensitivity that is a rarely investigated structure. The designed device consists of a metal–insulator–metal (MIM) waveguide with two rectangular stubs side-coupled with an elliptical resonator embedded with an air path in the resonator and several metal defects set in the bus waveguide. We systematically studied three types of sensor structures employing the finite element method. Results show that the surface plasmon mode’s splitting is affected by the geometry of the sensor. We found that the transmittance dips and peaks can dramatically change by adding the dual air stubs, and the light–matter interaction can effectively enhance by embedding an air path in the resonator and the metal defects in the bus waveguide. The double air stubs and an air path contribute to the cavity plasmon resonance, and the metal defects facilitate the gap plasmon resonance in the proposed plasmonic sensor, resulting in remarkable characteristics compared with those of plasmonic sensors. The high sensitivity of 2600 nm/RIU and 1200 nm/RIU can simultaneously achieve in mode 1 and mode 2 of the proposed type 3 structure, which considerably raises the sensitivity by 216.67% for mode 1 and 133.33% for mode 2 compared to its regular counterpart, i.e., type 2 structure. The designed sensing structure can detect the material’s refractive index in a wide range of gas, liquids, and biomaterials (e.g., hemoglobin concentration).

scholarly journals Sensing Features of the Fano Resonance in an MIM Waveguide Coupled with an Elliptical Ring Resonant Cavity

2020 ◽  
Vol 10 (15) ◽  
pp. 5096
Author(s):  
Hao Su ◽  
Shubin Yan ◽  
Xiaoyu Yang ◽  
Jing Guo ◽  
Jinxi Wang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Sensors ◽  
Fano Resonance ◽  
Resonant Cavity ◽  
Refractive Index Sensor ◽  
Geometrical Parameters ◽  
Elliptical Ring ◽  
Metal Insulator Metal ◽  
Promising Application ◽  
Mim Waveguide

In this article, a novel refractive index sensor composed of a metal–insulator–metal (MIM) waveguide with two rectangular stubs coupled with an elliptical ring resonator is proposed, the geometric parameters of which are controlled at a few hundreds of nanometer size. The transmission feature of the structure was studied by the finite element method based on electronic design automation (EDA) software COMSOL Multiphysics 5.4 (Stockholm, Sweden). The rectangular stub resonator can be thought of as a Fabry–Perot (FP) cavity, which can facilitate the Fano resonance. The simulation results reveal that the structure has a symmetric Lorentzian resonance, as well as an ultrasharp and asymmetrical Fano resonance. By adjusting the geometrical parameters, the sensitivity and figure of merit (FOM) of the structure can be optimized flexibly. After adjustments and optimization, the maximum sensitivity can reach up to 1550 nm/RIU (nanometer/Refractive Index Unit) and its FOM is 43.05. This structure presented in this article also has a promising application in highly integrated medical optical sensors to detect the concentration of hemoglobin and monitor body health.

Refractive Index Sensor Based on Fano Resonance in Microcapillary Resonator

2017 ◽  
Author(s):  
Yuejiang Song ◽  
Yunchong Peng ◽  
Yadong Miao ◽  
Mi Li ◽  
Yu Xiang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Fano Resonance ◽  
Refractive Index Sensor

Plasmonics refractive index sensor based on tunable ultra-sharp Fano resonance

2018 ◽  
Vol 14 (6) ◽  
pp. 421-424
Author(s):  
Zi-hua Liu ◽  
Li-zheng Ding ◽  
Jia-pu Yi ◽  
Zhong-chao Wei ◽  
Jian-ping Guo
Keyword(s):  
Refractive Index ◽  
Fano Resonance ◽  
Refractive Index Sensor

scholarly journals Fano-resonance-based refractive index sensor with ultra-high sensitivity

2021 ◽  
pp. 104327
Author(s):  
Shuocheng She ◽  
Sanmin Shen ◽  
Ziyi Wang ◽  
Qiulin Tan ◽  
Jijun Xiong ◽  
...  
Keyword(s):  
Refractive Index ◽  
Fano Resonance ◽  
High Sensitivity ◽  
Refractive Index Sensor

Highly sensitive refractive index sensor optimized for blood group sensing utilizing the Fano resonance

2020 ◽  
Author(s):  
Rakibul Hasan Sagor ◽  
Md. Farhad Hassan ◽  
Ahmad Azuad Yaseer ◽  
Ehsanuzzaman Surid ◽  
Md. Istiac Ahmed
Keyword(s):  
Refractive Index ◽  
Blood Group ◽  
Fano Resonance ◽  
Refractive Index Sensor ◽  
Highly Sensitive

A High-Performance Refractive Index Sensor Based on Fano Resonance in Si Split-Ring Metasurface

Plasmonics ◽  
2017 ◽  
Vol 13 (1) ◽  
pp. 15-19 ◽  
Author(s):  
Gui-Dong Liu ◽  
Xiang Zhai ◽  
Ling-Ling Wang ◽  
Qi Lin ◽  
Sheng-Xuan Xia ◽  
...  
Keyword(s):  
Refractive Index ◽  
Fano Resonance ◽  
High Performance ◽  
Refractive Index Sensor ◽  
Split Ring

scholarly journals PVC Detection through a Hybrid SEIRA Substrate and Refractive Index Sensor Based on Metamaterial Perfect Absorbers

Coatings ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 789
Author(s):  
Chieh-Ting Lin ◽  
Ta-Jen Yen ◽  
Tsung-Yu Huang
Keyword(s):  
Refractive Index ◽  
Infrared Absorption ◽  
Fano Resonance ◽  
Quantitative Measurement ◽  
Split Ring Resonator ◽  
Refractive Index Sensor ◽  
Perfect Absorber ◽  
Label Free ◽  
Surface Enhanced ◽  
Main Operating

Simultaneous surface enhanced infrared absorption (SEIRA) with Fano resonance and refractive index (RI) sensing are proposed via a split-ring-resonator-based metamaterial perfect absorber (MPA) to detect polyvinyl chloride (PVC), a commonly used polymer but one that was recently prohibited in many areas such as Europe. This bifunctional sensor could provide a label-free and qualitative PVC detection through SEIRA coupled to the vibration mode and a quantitative measurement through RI sensing. To design the MPA, the main operating frequency is targeted at 615 cm−1 for C-Cl bond of PVC. Transition from a reflectance dip to a peak, i.e., Fano resonance was observed at y polarization in both simulation and experiments, evidencing the existence of PVC. On the other hand, to test the RI sensing ability of the MPA, different RI (from 1 to 1.5) of analytes and different thicknesses (from 109 to 1050 nm) of polymethyl methacrylate (PMMA) were applied to the MPA in simulation and experiments, respectively. The simulated sensitivities are 4045 and 2361 nm/RIU for the first and third modes of the MPA, respectively, while the measured sensitivities based on PMMA are 3713 and 1694 nm/RIU. Overall, the detection limit of PVC could be down to 0.5% in experiments, which outweighs the current measurement limit of 10% through infrared absorption measurement.

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