scholarly journals Additively Manufactured Multi-Material Ultrathin Metasurfaces for Broadband Circular Polarization Decoupled Beams and Orbital Angular Momentum Generation

2021 ◽  
Author(s):  
Jianfeng Zhu ◽  
Yang Yang ◽  
Nathan Hu ◽  
Shaowei Liao ◽  
Jaim Nulman
Keyword(s):  
Angular Momentum ◽  
Circular Polarization ◽  
Orbital Angular Momentum

Transmissive 2-bit anisotropic coding metasurface

2022 ◽  
Author(s):  
Pengtao Lai ◽  
Zenglin Li ◽  
Wei Wang ◽  
Jia Qu ◽  
Liang Wei Wu ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Electromagnetic Wave ◽  
Circular Polarization ◽  
Orbital Angular Momentum ◽  
Electromagnetic Waves ◽  
Beam Splitter ◽  
Far Field ◽  
Polarization Conversion ◽  
Field Patterns ◽  
Phase Profile

Abstract Coding metasurfaces have attracted tremendous interests due to unique capabilities of manipulating electromagnetic wave. However, archiving transmissive coding metasurface is still challenging. Here we propose a transmissive anisotropic coding metasurface that enables the independent control of two orthogonal polarizations. The polarization beam splitter and the OAM generator have been studied as typical applications of anisotropic 2-bit coding metasurface. The simulated far field patterns illustrate that the x and y polarized electromagnetic waves are deflected into two different directions, respectively. The anisotropic coding metasurface has been experimentally verified to realize an orbital angular momentum (OAM) beam with l = 2 of right-handed polarized wave, resulting from both contributions from linear-to-circular polarization conversion and the phase profile modulation. This work is beneficial to enrich the polarization manipulation field and develop transmissive coding metasurfaces.

scholarly journals Generation of Orbital Angular Momentum Beam With Circular Polarization Ceramic Antenna Array

2019 ◽  
Vol 11 (2) ◽  
pp. 1-8 ◽  
Author(s):  
Ke Bi ◽  
Jianchun Xu ◽  
Daquan Yang ◽  
Yanan Hao ◽  
Xinlu Gao ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Circular Polarization ◽  
Antenna Array ◽  
Orbital Angular Momentum

scholarly journals Phase Singularities to Polarization Singularities

2020 ◽  
Vol 2020 ◽  
pp. 1-33
Author(s):  
Ruchi ◽  
P. Senthilkumaran ◽  
Sushanta Kumar Pal
Keyword(s):  
Angular Momentum ◽  
Circular Polarization ◽  
Orbital Angular Momentum ◽  
Polarization Vector ◽  
Scalar Fields ◽  
Phase Gradient ◽  
Phase Singularities ◽  
Light Beams

Polarization singularities are superpositions of orbital angular momentum (OAM) states in orthogonal circular polarization basis. The intrinsic OAM of light beams arises due to the helical wavefronts of phase singularities. In phase singularities, circulating phase gradients and, in polarization singularities, circulating ϕ12 Stokes phase gradients are present. At the phase and polarization singularities, undefined quantities are the phase and ϕ12 Stokes phase, respectively. Conversion of circulating phase gradient into circulating Stokes phase gradient reveals the connection between phase (scalar) and polarization (vector) singularities. We demonstrate this by theoretically and experimentally generating polarization singularities using phase singularities. Furthermore, the relation between scalar fields and Stokes fields and the singularities in each of them is discussed. This paper is written as a tutorial-cum-review-type article keeping in mind the beginners and researchers in other areas, yet many of the concepts are given novel explanations by adopting different approaches from the available literature on this subject.

Circular Polarization and Mode Reconfigurable Wideband Orbital Angular Momentum Patch Array Antenna

2018 ◽  
Vol 66 (4) ◽  
pp. 1796-1804 ◽  
Author(s):  
Qiang Liu ◽  
Zhi Ning Chen ◽  
Yuanan Liu ◽  
Fuhai Li ◽  
Yu Chen ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Circular Polarization ◽  
Orbital Angular Momentum ◽  
Array Antenna

Advanced Mode Unity Using Loop Antennas Proximate to Reflector for Orbital Angular Momentum Communication

2018 ◽  
Author(s):  
Ryohei Yamagishi ◽  
Hiroto Otsuka ◽  
Ryo Ishikawa ◽  
Akira Saitou ◽  
Hiroshi Suzuki ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Loop Antennas
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