Merging bands of polarization convertors by suppressing Fano resonance

Fu, Xinmin; Wang, Jiafu; Yang, Fan; Feng, Ming; Yan, Mingbao; Li, Yongfeng; Chen, Hongya; Zhang, Jieqiu; Qu, Shaobo

doi:10.1063/1.5048247

Cited by 22 publications

(15 citation statements)

References 19 publications

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“…With the rapid development of artificial EM media, metamaterials, composed of 2D or 3D periodic or quasi-periodic sub-wavelength inclusions, have gained extensive attention from both the academic and engineering communities. Metamaterials exhibit unique EM properties that are impossible or very hard to be obtained with natural materials, such as adjusting the scattering parameters and changing equivalent wave impedance [12]- [15]. This provides unprecedented freedom in manipulating reflection /refraction of EM waves [16]- [18].…”

Section: Introductionmentioning

confidence: 99%

Wide-Angle Transmission Enhancement of Metamaterial-Doped Fiber-Reinforced Polymers

Zheng

Wang

et al. 2019

IEEE Access

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In this paper, we propose to enhance the transmission of EM waves through fiber-reinforced polymers (FRPs) by modifying the local field distributions using the metamaterial inclusions. Due to the higher permittivity of FRPs relative to the air, the transmission of the s-polarized waves decreases drastically with the incidence angle θ i. By doping metallic strips into an FRP plate, the magnetic vectors in the plate are tilted vertically under large incidence angles, and hence, the refracted angle in the plate is increased. This is equivalent to reduce the effective permittivity of the FRP, which enables significant transmission enhancement, especially under large incidence angles. A Ku-band prototype was designed, fabricated, and measured. Both simulated and measured results verify that the metamaterial doping can achieve transmission enhancement in an ultra-wide incidence angle range θ i ∈ [0, 80 • ]. This paper provides an effective route to the design of transparent radomes for base stations, aircraft, and so on. INDEX TERMS Wide-angle transmission, electromagnetic transparency, metamaterial doping.

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Section: Introductionmentioning

confidence: 99%

Wide-Angle Transmission Enhancement of Metamaterial-Doped Fiber-Reinforced Polymers

Zheng

Wang

et al. 2019

IEEE Access

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“…Fano resonance can be introduced by the strong interaction between bright and dark modes. More intuitively, Fano resonances can be caused by the interaction between the electric dipoles 34 , 35 .…”

Section: Simulated Results Analysismentioning

confidence: 99%

Single-layer metasurface for ultra-wideband polarization conversion: bandwidth extension via Fano resonance

Zhang

Wang

et al. 2021

Sci Rep

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In this paper, we propose a method of designing ultra-wideband single-layer metasurfaces for cross-polarization conversion, via the introduction of Fano resonances. By adding sub-branches onto the unit cell structure, the induced surface currents are disturbed, leading to coexistence of both bright and dark modes at higher frequencies. Due to the strong interaction between the two modes, Fano resonance can be produced. In this way, five resonances in all are produced by the single-layer metasurface. The first four are conventional and are generated by electric and magnetic resonances, whereas the fifth one is caused by Fano resonance, which further extends the bandwidth. A prototype was designed, fabricated and measured to verify this method. Both the simulated and measured results show that a 1:4.4 bandwidth can be achieved for both x- and y-polarized waves, with almost all polarization conversion ratio (PCR) above 90%. This method provides an effective alternative to metasurface bandwidth extension and can also be extended to higher bands such as THz and infrared frequencies.

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“…Among them, THz perfect absorbers based on metamaterials have many advantages, such as ultra-thin dielectric layers, lightweight, and controllable performance (including frequency and absorbance) [ 5 ]. As a result, perfect absorbers, including single and double band, multi-band, and broadband devices, have become a hot topic for researchers [ 6 , 7 , 8 ]. However, the function of conventional THz metamaterials was fixed after their preparation.…”

Section: Introductionmentioning

confidence: 99%

Vanadium Dioxide-Based Terahertz Metamaterial Devices Switchable between Transmission and Absorption

et al. 2022

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Terahertz metamaterial plays a significant role in the development of imaging, sensing, and communications. The function of conventional terahertz metamaterials was fixed after fabrication. They can only achieve a single function and do not have adjustable characteristics, which greatly limits the scalability and practical application of metamaterial. Here, we propose a vanadium dioxide-based terahertz metamaterial device, which is switchable between being a transmitter and an absorber. The transmission and absorption characteristics and temperature tunable properties of phase change metamaterials in the terahertz band were investigated. As the temperature of vanadium dioxide is varied between 20 °C and 80 °C, the device can switch between transmission and quad-band resonance absorption at the terahertz frequency range, with a high transmission rate of over 80% and a peak absorbance of 98.3%, respectively. In addition, when the device acts as an absorber, the proposed metamaterial device is tunable, and the modulation amplitude can reach 94.3%; while the device is used as a transmissive device, the modulation amplitude of the transmission peak at 81%. The results indicate that the proposed metamaterial device can promote the applications of terahertz devices, such as switching, modulation, and sensing.

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Merging bands of polarization convertors by suppressing Fano resonance

Cited by 22 publications

References 19 publications

Wide-Angle Transmission Enhancement of Metamaterial-Doped Fiber-Reinforced Polymers

Wide-Angle Transmission Enhancement of Metamaterial-Doped Fiber-Reinforced Polymers

Single-layer metasurface for ultra-wideband polarization conversion: bandwidth extension via Fano resonance

Vanadium Dioxide-Based Terahertz Metamaterial Devices Switchable between Transmission and Absorption

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