High-Efficiency Cross Polarization Converters by Plasmonic Metasurface

Li, Rongzhen; Guo, Zhongyi; Wang, Wei; Zhang, Jingran; Zhang, Anjun; Liu, Jianlong; Qu, Shiliang; Gao, Jun

doi:10.1007/s11468-015-9916-3

Cited by 30 publications

(11 citation statements)

References 27 publications

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“…In general, a phase difference between adjacent elements in the array produces a sloped isophase plane, which deflects the beam and realizes beam steering. The beam deflection angle is proportional to the phase difference, which could be described by the generalized Snell's law [37,38]:…”

Section: Beam Steeringmentioning

confidence: 99%

Tunable Beam Steering, Focusing and Generating of Orbital Angular Momentum Vortex Beams Using High-Order Patch Array

et al. 2019

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In this paper, a tunable patch array based on high-order is proposed at the frequency of 300 GHz, achieving active controllable beam steering, focusing and generation of orbital angular momentum vortex beams. It has been demonstrated that the patch array can achieve wide beam scanning angle by controlling the phase of array elements with tunable phase shifters. Meanwhile, beam focusing on the specified position can also be realized by phase modulation of array elements based on the focusing theory. In addition, we also designed a patch array to generate vortex beams with multiple topological charges by high-order modes. The performances show that the patch antenna array we designed has a good application prospect.

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Section: Beam Steeringmentioning

confidence: 99%

Tunable Beam Steering, Focusing and Generating of Orbital Angular Momentum Vortex Beams Using High-Order Patch Array

et al. 2019

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“…Furthermore, each pixel consists of an aperture with a determined orientation angle of θ along the x direction, which is fabricated in the gold film with the thickness of 40 nm, and the aperture dimension is 150 nm × 75 nm. The transmitted lights for the circularly polarized light incidence to the aperture can be decomposed into two circular polarization components, with one component possessing the same helicity as the incident light and a phase that does not depend on the orientation of the aperture, and the other with opposite helicity (cross polarization) to the incident light and a phase (Pancharatnam-Berry phase) [16,17] that is twice the orientation angle of the aperture. Therefore, an arbitrary phase simply can be achieved by controlling the orientation angles of the apertures, which greatly eases the encoding procedure of phase-only metalens.…”

Section: Designsmentioning

confidence: 99%

Arbitrary focusing lens by holographic metasurface

Li¹,

Guo²,

Wang³

et al. 2015

Photon. Res.

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In this paper, an ultrathin metalens has been proposed based on a holographic metasurface that consists of elongated apertures in 40 nm gold film, which exhibit intriguing properties such as on-and off-axis focusing and also can concentrate light into multiple, discrete spots for circularly polarized incident lights. First, the spatial transmission phase distributions of the designed metalens with arbitrary focusing can be obtained by computergenerated holography. Then, the discrete phase distributions can be continuously encoded by subwavelength nanoapertures with spatially varying orientations in gold film. The simulation results show that our designed metalens can work efficiently for different types of focusing. Finally, our metasurface shows superior broadband characteristics between 670 and 810 nm, and the corresponding focal lengths of the designed lenses also can be efficiently modulated with the incident lights at different wavelengths.

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“…Optical metasurfaces, a two-dimensional planar variation of the concept of metamaterials, have been engineered to realize exotic electromagnetic properties by control of the phase, amplitude, and polarization of incident light, which are capable of being manipulated in a desirable manner [ 1 , 2 ]. A metasurface is usually composed of nano-antennas or nano-apertures because of introduced arbitrary abrupt phase shifts by adjusting geometric sizes [ 3 , 4 , 5 ]. Compared to the conventional optical devices, devices made from metasurfaces have the advantage of ultrathin, highly integrated, versatile, low-cost characteristics [ 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

High-Efficiency Visible Transmitting Polarizations Devices Based on the GaN Metasurface

Guo

et al. 2018

Nanomaterials

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Metasurfaces are capable of tailoring the amplitude, phase, and polarization of incident light to design various polarization devices. Here, we propose a metasurface based on the novel dielectric material gallium nitride (GaN) to realize high-efficiency modulation for both of the orthogonal linear polarizations simultaneously in the visible range. Both modulated transmitted phases of the orthogonal linear polarizations can almost span the whole 2π range by tailoring geometric sizes of the GaN nanobricks, while maintaining high values of transmission (almost all over 90%). At the wavelength of 530 nm, we designed and realized the beam splitter and the focusing lenses successfully. To further prove that our proposed method is suitable for arbitrary orthogonal linear polarization, we also designed a three-dimensional (3D) metalens that can simultaneously focus the X-, Y-, 45°, and 135° linear polarizations on spatially symmetric positions, which can be applied to the linear polarization measurement. Our work provides a possible method to achieve high-efficiency multifunctional optical devices in visible light by extending the modulating dimensions.

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High-Efficiency Cross Polarization Converters by Plasmonic Metasurface

Cited by 30 publications

References 27 publications

Tunable Beam Steering, Focusing and Generating of Orbital Angular Momentum Vortex Beams Using High-Order Patch Array

Tunable Beam Steering, Focusing and Generating of Orbital Angular Momentum Vortex Beams Using High-Order Patch Array

Arbitrary focusing lens by holographic metasurface

High-Efficiency Visible Transmitting Polarizations Devices Based on the GaN Metasurface

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