Nonreciprocal Fano resonance enhanced unidirectional scattering by subwavelength magnetic meta-atoms

Chen, Yiyun; He, Jiafei; Zhao, Lingzhong; Zhang, Yaping; Zhang, Lin; Ba, Qingtao; Luo, Qilin; Liu, Shiyang

doi:10.1016/j.rinp.2023.106905

Cited by 2 publications

(2 citation statements)

References 75 publications

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“…Based on resonance-enhanced light-matter interaction, metamaterials have become a promising platform for developing non-invasive and sensitive biosensors [4,5]. In addition, by breaking the time-reversal symmetry with a magnetic field, novel nonreciprocal properties such as unidirectional light absorption and scattering have been reported in magnetic metamaterials, which have added new degrees of freedom for light manipulation [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Narrow-band and highly absorbing fano resonance in a cavity-coupled dielectric metasurface

Yu,

Wulan,

Xing

et al. 2023

Mater. Res. Express

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Metamaterial resonance offers a flexibility in engineering the frequency and bandwidth of light absorption for a variety of optoelectronic applications such as wavelength-selective photodetection, optical sensing and infrared camouflaging etc. In this paper, we demonstrate a class of metal-dielectric thin-film cavity-coupled dielectric metasurfaces, which feature Fano resonances with both narrow bandwidth and strong light absorption. Our fabricated metasurface consists of a Si cuboid array on top of a SiO2 film backed with a metallic Cu layer. The weak coupling between electric mie mode in Si cuboid and Fabry–Perot mode within the SiO2 spacer layer yields a Fano resonance at 4.19 μm wavelength, which exhibits a strong light absorption of 65.8% and a quality (Q) factor of 112. The strongly absorbing Fano resonance is tunable within the 3–5 μm band by varying geometric parameters of the metasurface. To reveal potential application of the metasurface, the Fano resonance is applied in refractive index sensing and exhibits a sensitivity of 518.75 nm RIU−1 and a figure-of-merit (FoM) of 14.82 RIU−1. These results suggest that cavity-coupling presents an effective way in reducing the resonance bandwidth and enhancing light absorption in dielectric metamaterials, which holds promise for expanding the properties and device functionalities of metamaterials.

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Section: Introductionmentioning

confidence: 99%

Narrow-band and highly absorbing fano resonance in a cavity-coupled dielectric metasurface

Yu,

Wulan,

Xing

et al. 2023

Mater. Res. Express

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show abstract

“…Compared with patch antennas, dielectric resonator antennas (DRAs) offer the advantages of smaller size and better stability [ 26 , 27 ], which makes them favorable for integration into microdevices and long-term monitoring applications. Dielectric resonators (DRs) not only exhibit different properties under different physical size conditions [ 28 ] but also can apply some special properties to extend the additional effects [ 29 , 30 ]. Therefore, combining DRAs with TSs is a promising research direction that deserves exploration.…”

Section: Introductionmentioning

confidence: 99%

Multifunction Applications of Filtering Dielectric Resonator Antenna Based on Liquid Crystal

Xia,

Zhang,

Zhang

2023

Sensors

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In this paper, a new type of multifunctional device is realized by designing a filtering dielectric resonator antenna (FDRA) with liquid crystal (LC). The LC is encapsulated by glass plates and placed between the feeding network and the ground. Firstly, the resonance frequencies of the hairpin bandpass filter (|S11| is less than −10 dB) move simultaneously when the dielectric constant of LC changes at different temperatures. Then, the hairpin bandpass filter is extended to an FDRA, and the influence of the dielectric constant of LC on the antenna performance parameters is realized to the function of the temperature sensor. The results show that the dielectric constant of LC has an approximately linear relationship with the resonance frequencies of the FDRA. Simultaneously, the axial ratio, gain, antenna efficiency, E-field distribution, and pattern of the FDRA have changed significantly. Furthermore, the FDRA mainly works in the frequency range of 4.65~5.53 GHz, which has good antenna performance and filtering characteristics. Taking resonance frequency fx as an example, its sensitivity, maximum FOM, minimum detection limit, and minimum resolution are determined to be 95 GHz/RIU, 0.5, 0.1, and 9.68, respectively. The multifunctional device provides a novel approach and solution for the transmission of antenna signals and temperature measurements.

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Nonreciprocal Fano resonance enhanced unidirectional scattering by subwavelength magnetic meta-atoms

Cited by 2 publications

References 75 publications

Narrow-band and highly absorbing fano resonance in a cavity-coupled dielectric metasurface

Narrow-band and highly absorbing fano resonance in a cavity-coupled dielectric metasurface

Multifunction Applications of Filtering Dielectric Resonator Antenna Based on Liquid Crystal

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