Ultrathin dual-mode vortex beam generator based on anisotropic coding metasurface

Zhang, Liang; Guo, Jie; Ding, Tongyu

doi:10.1038/s41598-021-85374-4

Cited by 21 publications

(3 citation statements)

References 47 publications

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“…))𝑒 (𝑖𝑙𝜑) (3) Among them, 𝑙 is the number of OAM modes, or called topological charges; 𝑝 is the radial mode value, representing the phase change along the radial direction. 𝑤(𝒛) = 𝒘 0 √1 + (𝒛 𝒛𝑹 ⁄ ) 2 , 𝑤 0 is the beam radius of the Gaussian term, 𝑧𝑅 = 𝜋𝑤 0 2 𝜆 ⁄ represents the Rayleigh distance; 𝑳 𝑝 |𝑙| is a Laguerre polynomial. Since the beam carries the phase factor 𝑒 𝑗𝑙𝜑 , its wavefront phase is no longer a continuous plane or spherical distribution, but has a spiral structure.…”

Section: Theoretical Basis Of Vortex Em Wavesmentioning

confidence: 99%

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Retracted: Design and Performance Evaluation of OAM-Antennas: A Comparative Review

Saraereh

2023

IEEE Access

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For many communication systems, including wireless networks, mobile, satellite, radar, remote sensing, and many more applications, antenna arrays are very necessary. Utilizing effective beamforming techniques, antenna arrays have recently played a major part in driving data rates and system capacity to extremely high levels. The beamforming capabilities and system performance are both greatly influenced by the array configuration. Numerous array structures, including linear, two-dimensional, circular, conical, cylindrical, spherical, and even non-uniform array shapes, can be used in different applications. Modern communication systems pay a lot of attention to reconfigurable antennas because of the many applications they may serve and the added functionality they provide. A single structure that has the ability to change between one or a number of features, such as frequency, pattern, and polarization, is referred to as a reconfigurable antenna. Utilizing a specific circular phased microstrip antenna array, the orbital angular moment (OAM) vortex electromagnetic wave is created, allowing for more effective and dependable data transmission. When propagating, the vortex electromagnetic wave has a spiral phase wavefront structure, and its many OAM modes are orthogonal to one another. The helical antenna offers the benefits of light weight, small size, and excellent circular polarization when compared to other OAM radio producing techniques. This paper reviews various state-of-the-art antennas for 5G applications. Specifically, the single microstrip, array, traveling wave and metasurface antennas have been discussed and their important aspects were elaborated. Finally, the applications and future prospects were described.

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Section: Theoretical Basis Of Vortex Em Wavesmentioning

confidence: 99%

“…Recently, various new approaches were proposed to model the antennas, in which ChatGPT has important role. The author in [2] theoretically predicted the mechanical effect of spin angular momentum related to circularly polarized electromagnetic fields. After that, reference [3] were experimentally verified.…”

Section: Introductionmentioning

confidence: 99%

Retracted: Design and Performance Evaluation of OAM-Antennas: A Comparative Review

Saraereh

2023

IEEE Access

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“…The significant benefits of the metasurface over traditional components of optical systems are great flexibility and ultrathin size [23][24][25]. They can also be designed for deflecting light [26], generating holograms [27], focusing [28], circular dichroism [29,30], vortex beams production [31], modulating light intensity [32], lensing, imaging and beam splitting [33]. It can also be utilized to replace bulk optics for 3D imaging, in addition to conventional 2D imaging [34].…”

Section: Corresponding Author *Juanliu@biteducnmentioning

confidence: 99%

Design of Ultrathin Metasurface for Multiview 3D Display Based on Look-Up-Table Method

Ahmad,

Li,

Zhou

et al. 2024

IEEE Photonics J.

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Multiview display has attention owing to its smooth motion parallax, visual discomfort alleviation, and wide depth of focus. Nevertheless, its applications are limited because of the freedom to design ultrathin display systems. This paper proposes a novel method to design the system freely by using ultrathin metasurface in conjunction with a flat panel to reduce the system's complexity. We demonstrate ultrathin metasurface for red (637nm), green (532nm), and blue (457nm) wavelengths by using the look-up table method, and the subpixel of the metasurface are mapped according to the pixel arrangements of the LCD panel. The proposed 3D multiview display system produces 8 views at the optimal distance of 1000mm from the LCD screen. Numerical simulation is implemented to verify the effectiveness of proposed method and the results show that it can achieve a multiview 3D display with high quality. The thickness of metasurface is 2µm. The proposed metasurface for multiview display has great potential to underpin the development meta-optics-based operations in the field of integrated optics and imaging

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Orthogonal‐Based Reconfigurable Light‐Controlled Metasurface for Multichannel Amplitude‐Modulation Communication

Li,

Zhu,

Sui

et al. 2024

Laser & Photonics Reviews

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Optical‐control reconfigurable metasurfaces can avoid crosstalk between microwave signal and direct current (DC) signal caused by physical wire connection, which paves a paradigm for dynamically and remotely controlling electromagnetic (EM) wave. However, the traditional light‐controlled reconfigurable metasurfaces mainly focus on the modulation of single polarized EM wave, which is difficult to adapt to the modulation of various signals in communication. In this work, a photoresistor is fully embedded into the meta‐atom as an active device, and a light‐controlled reconfigurable metasurface (LCRM) with multi‐polarization amplitude modulations is proposed. The designed metasurface controls the luminous intensity of light emitting diode (LED) array through computer, and then adjusts the photoresistor value, which can achieve amplitude modulations. In order to verify the feasibility and effectiveness of the proposed framework, the metasurface is simulated, fabricated, and measured, and the measurement results are basically consistent with the theoretical simulation results. Based on the EM characteristics of the designed metasurface, linear polarized (LP) wave synthesis and information transmission are carried out to demonstrate the design. This work designs an amplitude modulation metasurface under orthogonal‐polarization wave incidence to expand the LCRM application, which has broad development prospects in many fields such as information transmission, communication systems, and holographic imaging.

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Ultrathin dual-mode vortex beam generator based on anisotropic coding metasurface

Cited by 21 publications

References 47 publications

Retracted: Design and Performance Evaluation of OAM-Antennas: A Comparative Review

Retracted: Design and Performance Evaluation of OAM-Antennas: A Comparative Review

Design of Ultrathin Metasurface for Multiview 3D Display Based on Look-Up-Table Method

Orthogonal‐Based Reconfigurable Light‐Controlled Metasurface for Multichannel Amplitude‐Modulation Communication

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