Wideband Tunable Cross Polarization Converter Based on a Graphene Metasurface With a Hollow-Carved “H” Array

Chen, Ming; Chang, Linzi; Gao, Xi; Chen, Hui; Wang, Chongyun; Xu, Xiaofei; Zhao, Deping

doi:10.1109/jphot.2017.2734915

Cited by 40 publications

(31 citation statements)

References 48 publications

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“…Nanocross has also been used in to efficiently convert the polarization states [32], [34]. Other structures, such as Hollow-Carved "H" Array [41], butterfly-shaped holes [42], have also been demonstrated to be suitable to achieve high polarization conversion efficiency. Nevertheless, most of these polarization devices work at the mid-infrared range with relatively narrow bandwidth.…”

Section: Introductionmentioning

confidence: 99%

Broadband tunable terahertz polarization converter based on a sinusoidally-slotted graphene metamaterial

Zhu¹,

Li²,

Deng³

et al. 2018

Opt. Mater. Express

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A new wideband sinusoidally-slotted graphene-based cross-polarization converter (CPC) is proposed in this paper. The proposed polarization converter can realize a broadband terahertz polarization conversion from 1.28 to 2.13-THz with a polarization conversion ratio (PCR) of more than 0.85. Taking advantage of the gradient width modulation of the graphene-based unit structure, the continuous plasmon resonances are excited at the edges of the sinusoidal slot. Therefore, the proposed converter can achieve a broadband polarization conversion in a simplified structure. Furthermore, the polarization conversion characteristics of the CPC are insensitive to the incident angle. The PCR remains more than 0.85 with little bandwidth degradation even as the incident angle increases to as high as 50°. More importantly, the operating bandwidth and the magnitude of the PCR can be tuned easily by adjusting the chemical potential and the electron scattering times of the graphene. In a way, we believe this kind of graphene-based polarization converter can enrich the polarization conversion community for realizing broadband and tunable polarization conversion.

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Section: Introductionmentioning

confidence: 99%

Broadband tunable terahertz polarization converter based on a sinusoidally-slotted graphene metamaterial

Zhu¹,

Li²,

Deng³

et al. 2018

Opt. Mater. Express

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“…Numerous reflective and transmissive polarization converters based upon chiral or anisotropic metasurfaces have been designed from microwave to optical frequencies [19]- [25]. For example, Hao et al [26] designed a linear polarization converter using anisotropic metamaterial with I-shaped structure.…”

Section: Dual-bandwidth Linear Polarization Convertermentioning

confidence: 99%

Dual-Bandwidth Linear Polarization Converter Based on Anisotropic Metasurface

Sun

Han

et al. 2020

IEEE Photonics J.

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In this work, a metasurface with the symmetrical double C-shaped narrow ring connected with the central cross structure is investigated by simulation, theory and experiment, which can near-perfectly convert linearly polarized electromagnetic waves into their orthogonal components in the frequency ranges from 9.38 to 13.36 GHz and 14.84 to 20.36 GHz. And the corresponding fractional bandwidths within the two bands are 35.00% and 31.36%, respectively. The influences of structural parameters on the polarization conversion performance are studied. The results show that the central frequencies and bandwidths of the two bands can be easily modulated by varying the structural parameters of r and θ. The high-efficiency and dual-broadband characteristics can also be well maintained in the oblique incidence range of 0-45°. Meanwhile, the mechanisms of polarization conversion are analysed, and several formulas are used to calculate the reflection coefficients of the co-and cross-polarization under the normal incident y-polarized electromagnetic waves based on the phase difference of the reflection coefficients of the uand v-polarized conversions. The experiment results are in good agreement with those of simulations and theoretical analysis. The proposed metasurface has important applications in novel polarization control devices.

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“…Graphene-based wideband LCPCs have also been investigated to dynamically control the manipulation [39][40][41]. However, in all these polarization converters [39][40][41][42][43][44][45][46], most of the researchers have worked on reflection-based polarization conversion. Recently, Jiang et al numerically investigated an excellent and broadband LCPC using reflective layers [47].…”

Section: Introductionmentioning

confidence: 99%

A Wideband Terahertz Transmissive Polarization Manipulator Based on Metasurfaces

2019

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Wideband and multifunction operation for THz polarization manipulating devices has been desired for a wide range of applications. In this paper, a novel wideband transmissive type polarization manipulator based on metasurfaces is proposed in the THz region. The designed metasurface acts as a multifunctional polarization manipulator, performing linear to circular polarization conversion (LCPC) for relative bandwidth 43.9% (0.94 THz to 1.47 THz) for incident x/y polarizations and a wideband bandpass filter with relative bandwidth 67% (0.713 THz to 1.4346 THz) for incident slant (xy) polarizations. Wideband LCPC operation is achieved using a unique diagonal symmetric structure based on a bilayered metasurface. In order to confirm the validation of proposed results, electromagnetic simulation was carried out in two industry-standard software packages, HFSS and CST, using frequency domain and time domain solvers, respectively. Close agreement between numerical results depicts the validity and reliability of the proposed design. Polarized wave trajectory, equivalent microscopic circuit, physical mechanisms, and impact of different geometrical parameters on the performance is investigated. To the best of our knowledge, this is the first polarization manipulator based on bilayered metasurfaces. The same structure can be used as for LCPC and the transmit reject filter for THz wireless communication, including THz satellite communications, the future of communication. Moreover, they can be used in THz imaging and biomolecular control devices.

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Wideband Tunable Cross Polarization Converter Based on a Graphene Metasurface With a Hollow-Carved “H” Array

Cited by 40 publications

References 48 publications

Broadband tunable terahertz polarization converter based on a sinusoidally-slotted graphene metamaterial

Broadband tunable terahertz polarization converter based on a sinusoidally-slotted graphene metamaterial

Dual-Bandwidth Linear Polarization Converter Based on Anisotropic Metasurface

A Wideband Terahertz Transmissive Polarization Manipulator Based on Metasurfaces

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