Optical method for detecting the concentration of sucrose based on plasmonic nanostructures

Zhu, Jun; Yin, Jinguo

doi:10.1007/s42823-021-00302-w

Cited by 3 publications

(1 citation statement)

References 26 publications

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“…Where, the dielectric constant of the medium is ε i , and the dielectric constant of the metal is ε m (ω), β n eff *k 0 are the complex propagation constants of SPPs, n eff is the effective RI of the mode, k 0 2π/λ is the wave vector in vacuum [19].…”

Section: Propagation Characteristics and Numerical Calculation 21 Pro...mentioning

confidence: 99%

Glycerol concentration sensor based on the MIM waveguide structure

Zhu

2022

Front. Phys.

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Glycerol is widely used in medicine, industry and skin care products. This study investigated a high-sensitivity glycerol concentration sensor based on double Fano resonances in a metal-insulator-metal (MIM) waveguide structure, established a coupling model of a baffle waveguide (BW) and a circular split ring resonator (CSRR), and generated asymmetric double Fano resonances in the waveguide structure. The Fano resonance transmittance reached 0.82, and the linear relationship between the refractive index (RI) and the glycerol concentration was obtained using the sensitivity of the Fano resonance spectrum. The application of the proposed sensor for glycerol concentration detection revealed that the Fano resonance wavelength was redshifted with the RI and that the sensing sensitivity reached 1153.85 nm/refractive index unit (RIU); therefore, the quick detection of the corresponding glycerol concentration can be realized. This proposed structure has significance in the research of optical sensors and optical switches.

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Section: Propagation Characteristics and Numerical Calculation 21 Pro...mentioning

confidence: 99%

Glycerol concentration sensor based on the MIM waveguide structure

Zhu

2022

Front. Phys.

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Characterization of CCTRC Waveguide and Measurement of Vitamin C Concentration

Wu,

Zhu

2023

Plasmonics

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Optical-fibre characteristics based on Fano resonances and sensor application in blood glucose detection

Zhu

yin

2022

Opt. Express

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We propose an optical-fibre metal-insulator-metal (MIM) plasmonic sensor based on the Fano resonances of surface plasmon polaritons (SPPs). Its structure consists of a coupling fibre that connects C-shaped and rectangular cavities and a main fibre that contains a semi-circular resonator. When incident light passes through the main fibre, it excites SPPs along the interface between the metal and medium. The SPPs at the resonator induce Fano resonances, owing to the coupling effect. The results show that the designed optical-fibre MIM plasmonic sensor could flexibly tune the number of Fano resonances by adjusting the structure and geometric parameters to optimise the sensing performance. The full width at half maximum of the Lorentzian resonance spectra formed by the electric and magnetic fields reached 23 nm and 24 nm, respectively. The wavelength of the Fano resonance shifted as the refractive index changed; thus, the proposed sensor could realise the application of sensing and detection. The highest sensitivity achieved by the sensor was 1770 nm/RIU. Finally, we simulated the designed sensor to human blood-glucose-level detection, and observed that the resonance wavelength would increase with the increase of glucose concentration. Our study shows that optical fibres have broad application prospects in the field of electromagnetic switching and sensing.

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Optical method for detecting the concentration of sucrose based on plasmonic nanostructures

Cited by 3 publications

References 26 publications

Glycerol concentration sensor based on the MIM waveguide structure

Glycerol concentration sensor based on the MIM waveguide structure

Characterization of CCTRC Waveguide and Measurement of Vitamin C Concentration

Optical-fibre characteristics based on Fano resonances and sensor application in blood glucose detection

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