Fano resonance for applications

The nonlinear Fano effects on the absorption of hybrid systems composed of a silver nanosphere and an indoline dye molecule have been systematically investigated by the hybrid approach, which combines...

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A high sensitive sensor using MIM waveguide coupled with a rectangular cavity with Fano resonance

Optical and Quantum Electronics ◽

10.1007/s11082-021-02976-y ◽

2021 ◽

Vol 53 (6) ◽

Author(s):

Hocine Bahri ◽

Souheil Mouetsi ◽

Abdesselam Hocini ◽

Hocine Ben Salah

Keyword(s):

Fano Resonance ◽

Rectangular Cavity ◽

Sensitive Sensor ◽

Mim Waveguide

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High Sensitivity Plasmonic Sensor Based on Fano Resonance with Inverted U-Shaped Resonator

Sensors ◽

10.3390/s21041164 ◽

2021 ◽

Vol 21 (4) ◽

pp. 1164

Author(s):

Gongli Xiao ◽

Yanping Xu ◽

Hongyan Yang ◽

Zetao Ou ◽

Jianyun Chen ◽

...

Keyword(s):

Fano Resonance ◽

Figure Of Merit ◽

High Sensitivity ◽

Refractive Index Sensor ◽

Multimode Interference ◽

Geometrical Parameters ◽

The Finite Element Method ◽

Plasmonic Sensor ◽

Coupled Mode ◽

Plasmonic Nanosensor

Herein, we propose a tunable plasmonic sensor with Fano resonators in an inverted U-shaped resonator. By manipulating the sharp asymmetric Fano resonance peaks, a high-sensitivity refractive index sensor can be realized. Using the multimode interference coupled-mode theory and the finite element method, we numerically simulate the influences of geometrical parameters on the plasmonic sensor. Optimizing the structure parameters, we can achieve a high plasmonic sensor with the maximum sensitivity for 840 nm/RIUand figure of merit for 3.9 × 105. The research results provide a reliable theoretical basis for designing high sensitivity to the next generation plasmonic nanosensor.

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High-Sensitive Numerical Gas Detection Using LSPR Effect and Fano Resonance in a Slotted MDM Structure

Photonic Sensors ◽

10.1007/s13320-021-0634-5 ◽

2021 ◽

Author(s):

Hai Liu ◽

Benlei Zhao ◽

Xu Zhang ◽

Hancheng Zhang ◽

Bo Wu ◽

...

Keyword(s):

Fano Resonance ◽

Gas Sensing ◽

Field Enhancement ◽

Fast Response ◽

Gas Detection ◽

Localized Surface Plasmon ◽

Gas Sensitivity ◽

Combined Use ◽

Coherent Coupling ◽

Lspr Effect

AbstractA high-sensitive numerical measurement of methane based on the combined use of the localized surface plasmon resonance (LSPR) and Fano resonance in a slotted metal-dielectric-metal (MDM) periodic structure is numerically investigated. A groove is etched in an original MDM structure to excite the diploe mode at both sides of the groove, and the coherent coupling of two dipole modes is enhanced to realize a fast response, which is beneficial to gas-sensing. The influence of geometric parameters on the reflection spectra and methane sensitivity are analyzed to obtain optimal geometry. Moreover, an etching ring is introduced on the top metal to further raise the coupling area and coupling strength. The Fano resonance is subtly integrated into the optimized structure with asymmetry to achieve greater gas sensitivity. After the introduction of the Fano resonance, the field enhancement caused by the LSPR effect becomes greater and the methane sensitivity can reach up to 8.421 nm/% in numerical calculations, which increases 56.8% more than that of the original one. The combined use of the LSPR and Fano resonance in an optimized MDM structure provides an effective method for high-sensitive gas detection.

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A Plasmonic Refractive-Index Sensor Based Multiple Fano Resonance Multiplexing in Slot-Cavity Resonant System

Photonic Sensors ◽

10.1007/s13320-021-0631-8 ◽

2021 ◽

Author(s):

Zicong Guo ◽

Kunhua Wen ◽

Yuwen Qin ◽

Yihong Fang ◽

Zhengfeng Li ◽

...

Keyword(s):

Fano Resonance ◽

Fdtd Method ◽

Rectangular Cavity ◽

Refractive Index Sensor ◽

Right Wing ◽

Left Wing ◽

Resonant System ◽

Coupled Mode ◽

Metal Insulator Metal ◽

The Right

AbstractIn this paper, a sub-wavelength metal-insulator-metal (MIM) waveguide structure is proposed by using a cross-shape rectangular cavity, of which wings are coupled with two rectangular cavities. Firstly, a cross-shape rectangular cavity is placed between the input and output MIM waveguides. According to the mutual interference between bright and dark modes, three Fano resonant peaks are generated. Secondly, by adding a rectangular cavity on the left wing of the cross shaped one, five asymmetric Fano resonance peaks are obtained. Thirdly, six asymmetric Fano resonance peaks are achieved after adding another cavity on the right wing. Finally, the finite-difference-time-domain (FDTD) method and multimode interference coupled-mode theory (MICMT) are used to simulate and analyze the coupled plasmonic resonant system, respectively. The highest sensitivity of 1 000nm/RIU is achieved.

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