Switchable Fano Resonance Based on Cut-Induced Asymmetric Split-Ring Resonators with Dirac Semimetal Film

Tu, Dehua; Wu, Yiping; Xie, Jingya; Zang, Xiaofei; Ding, Lizhong; Chen, Lin

doi:10.1007/s11468-021-01417-6

Cited by 6 publications

(2 citation statements)

References 40 publications

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“…Not only that, MIM optical waveguides have also been designed for different applications, including filters [18,19], wavelength division multiplexers [20,21], couplers [22][23][24], and Bragg reflectors [25][26][27]. In these studies, a large number of Fano resonance structures based on MIM optical waveguides have been reported [28][29][30][31][32][33]. For example, a T-shaped cavity with multiple metal nanorod defects coupled to an MIM waveguide that can be used as a temperature sensor was designed by Chou et al [34].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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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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Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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“…Generally, there are two resonance dips in the Fano resonance. One is the wide absorption spectrum, known in quantum theory as the continuous state; the other is the narrow-band transmission spectrum, which is called the discrete state in quantum mechanics [32,33]. The unique Fano profile is attributed to the coupling between the continuous state and discrete state [34].…”

Section: Introductionmentioning

confidence: 99%

Bi-funtional resonance effects of plasmon-induced transparency and Fano-like response using an asymmetry metamaterial resonator consisting of three metallic strips at terahertz frequency

Yang¹,

Wu²,

Xu³

et al. 2021

Phys. Scr.

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Bi-functional metamaterial resonance device operated at terahertz frequency is designed in this paper. It is composed of three metallic strips, in which two parallel metallic strips having the identical dimensions are arranged in the longitudinal direction, and a single metallic strip deviated from the center position is arranged in the horizontal direction. Bi-functional resonance effects of plasmon-induced transparency (PIT) and Fano-like response are simultaneously obtained in this simple metamaterial structure. The formation mechanisms of the two resonance effects are analyzed with the aid of the near-field distributions and the dependence of structure parameters on the whole resonance performance. Results further show that the metallic strip placed horizontally plays an important role in adjusting the resonance response of the metamaterial resonator. More importantly, when the deviation value of the metallic strip in the horizontal direction exceeds a certain amount, for example 10 μm, the metamaterial resonator can realize the effective regulation from bi-functional resonance to single-functional PIT effect. Our proposed structure can be used as valuable platform for ideas to inspire the design of novel electro-optic devices.

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Terahertz Plasmonic Sensor based on bulk Dirac Semimetals

et al. 2023

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Switchable Fano Resonance Based on Cut-Induced Asymmetric Split-Ring Resonators with Dirac Semimetal Film

Cited by 6 publications

References 40 publications

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

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

Bi-funtional resonance effects of plasmon-induced transparency and Fano-like response using an asymmetry metamaterial resonator consisting of three metallic strips at terahertz frequency

Terahertz Plasmonic Sensor based on bulk Dirac Semimetals

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