Physical Explanation of Fabry–Pérot Cavity for Broadband Bilayer Metamaterials Polarization Converter

Jing, Xufeng; Gui, Xincui; Zhou, Pengwei; Hong, Zhi

doi:10.1109/jlt.2018.2808339

Cited by 149 publications

(36 citation statements)

References 33 publications

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“…It is found in the figure that one layer of gold-based PCM is printed on the top of the substrate TOPAS polymer [ 31 ]. The PCM pattern is a dual L-shaped structure with wide band and good polarization conversion characteristics [ 18 , 19 ]. As demonstrated in Fig.…”

Section: Methodsmentioning

confidence: 99%

“…The bandwidth of the converter in [ 18 ] is 0.2–0.4 THz (66.7%). Double L-shaped pattern and grating with Fabry-Perot-like resonance achieve a bandwidth from 0.55 to 1.37 THz (85.4%) [ 19 ]. Three-layer metasurfaces form a quarter-wave converter to convert a LP incident wave to a circular polarization (CP) wave, in a bandwidth of 2.1–8 THz (116.8%) [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

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Multi-functional Device with Switchable Functions of Absorption and Polarization Conversion at Terahertz Range

Peng

Xing

2018

Nanoscale Res Lett

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Terahertz electromagnetic (EM) wave components usually have a single function, such as they can only convert the polarization state of an incident wave or absorb the incident energy, which would be a limitation for their applications. To make a breakthrough, a multi-functional device (MFD) is proposed in this paper, and it is capable of switching between absorption mode and polarization conversion mode. The device has a low-profile and simple structure, and it is constructed by graphene-based absorbing metasurface (AM) and gold-based polarization conversion metasurface (PCM). By controlling the chemical potential (μc) of the graphene, the leading role is transferred between the AM and the PCM, which leads to steerable absorption and polarization conversion (PC) modes. For the PC mode, the simulated polarization conversion ratio (PCR) is larger than 0.9 in the 2.11–3.63-THz band (53.0% at 2.87 THz). For the absorption mode, the simulated absorptivity is larger than 80% in the 1.59–4.54-THz band (96.4% at 3.06 THz). The physical mechanisms and operating characteristics of the MFD are discussed. This research has potential applications in terahertz imaging, sensors, photodetectors, and modulators.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multi-functional Device with Switchable Functions of Absorption and Polarization Conversion at Terahertz Range

Peng

Xing

2018

Nanoscale Res Lett

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“…It's clear that the theoretical calculated results are well consistent with the numerical simulations, which further demonstrate that our design has an ultra-broadband and high efficiency in the terahertz region. Table 1 exhibits the comparison of polarization conversion performance between our study and other recently reported polarization converters in the terahertz regime [45][46][47][48][49]. The comparison indicates that our work has an ultra-broadband and high convert efficiently, in which PCR is above 90% in this paper, implying a high performance.…”

Section: Theory Analysismentioning

confidence: 59%

Ultra-Broadband Polarization Conversion Meta-Surface and its Application in Polarization Converter and RCS Reduction

Zhang

Liu

et al. 2020

IEEE Access

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In this paper, an ultra-broadband and high-efficiency polarization conversion metasurface is presented in the terahertz region. The metasureface is similar to a sandwiched structure, which is composed of the top Double Split Ring Resonator (DSRR), an intermediate dielectric layer and a bottom metal layer. Both numerical simulation and theoretical calculation results demonstrate that the proposed metasurface can convert linearly co-polarized waves into cross-polarized waves in the frequency from 2.04 THz to 5.33 THz with a relative bandwidth of 89% and the polarization conversion ratio (PCR) is over 90%. Further simulation results show that the proposed metasurface is insensitive to the polarization angle, and the physical mechanism is revealed in detail by the surface current distribution. In addition, two different kinds of 2-bit coding metasurfaces are designed based on the Pancharatnam-Berry (PB) Phase. The simulated and calculated results show that the proposed PB-coding metasurface has excellent performance in flexibly controlling terahertz wave reflection and low Radar Cross Section (RCS). A 10dB RCS reduction can be achieved from 1.9 THz to 5.5 THz under normal incidence. It provides new degrees of freedom for studying terahertz wave manipulation and reducing RCS.

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“…Metamaterials are novel artificial structures that are designed for specified functions like negative refractive index [1][2][3], polarization conversion [4][5][6] and perfect absorption [7][8][9]. Metasurfaces possess the advantages of small losses and are easy to manufacture [10,11], and have been attractive in recent years.…”

Section: Introductionmentioning

confidence: 99%

Polarization Controlled Dual Functional Reflective Planar Metalens in Near Infrared Regime

et al. 2020

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The metalens has been a hotspot in scientific communications in recent years. The polarization-controlled functional metalens is appealing in metalens investigation. We propose a metalens with dual functions that are controlled by polarization states. In the first design, when applied with x-and y-polarized light, two focal spots with different focal lengths are acquired, respectively. The proposed metalens performs well when illuminated with adjacent wavelengths. In the second design, the reflected light is focused when applied with x-polarized light, and when applied with y-polarized light, the reflected light is split into two oblique paths. We believe that the results will provide a new method in light manipulation.

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Physical Explanation of Fabry–Pérot Cavity for Broadband Bilayer Metamaterials Polarization Converter

Cited by 149 publications

References 33 publications

Multi-functional Device with Switchable Functions of Absorption and Polarization Conversion at Terahertz Range

Multi-functional Device with Switchable Functions of Absorption and Polarization Conversion at Terahertz Range

Ultra-Broadband Polarization Conversion Meta-Surface and its Application in Polarization Converter and RCS Reduction

Polarization Controlled Dual Functional Reflective Planar Metalens in Near Infrared Regime

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