Far-field diffraction pattern of an optical light beam with orbital angular momentum through of a rectangular and pentagonal aperture

Optik ◽  
2018 ◽  
Vol 164 ◽  
pp. 479-487 ◽  
Author(s):  
Cristian Acevedo ◽  
Yezid Torres Moreno ◽  
Ángela Guzmán
Keyword(s):  
Angular Momentum ◽  
Light Beam ◽  
Diffraction Pattern ◽  
Orbital Angular Momentum ◽  
Far Field

Detecting the topological charge of a vortex beam by an arc slit diffraction

2017 ◽  
Vol 31 (23) ◽  
pp. 1750172 ◽  
Author(s):  
Dongzhi Fu ◽  
Hailong Zhou ◽  
Kaiwei Wang ◽  
Pei Zhang ◽  
Jianji Dong ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Diffraction Pattern ◽  
Orbital Angular Momentum ◽  
Topological Charge ◽  
Light Spot ◽  
Far Field ◽  
Vortex Beam ◽  
Efficient Measurement ◽  
Vortex Beams

The simple and efficient measurement of the light orbital angular momentum (OAM) is essential to both the classical and quantum applications with vortex beams. Here, we study the diffraction pattern in the far field when a vortex beam passes through an arc slit and demonstrate experimentally that a light spot of the diffraction pattern has a displacement which is linear to the topological charge (TC) of the incident vortex beam. Based on this property, this method is capable of measuring both modulus and sign of TC of the vortex beam. Furthermore, this scheme allows identifying multiple OAM states simultaneously.

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 Transfer of orbital angular momentum from a super-continuum, white-light beam

2008 ◽  
Vol 16 (13) ◽  
pp. 9495 ◽  
Author(s):  
Amanda J. Wright ◽  
John M. Girkin ◽  
Graham M. Gibson ◽  
Jonathan Leach ◽  
Miles J. Padgett
Keyword(s):  
Angular Momentum ◽  
Light Beam ◽  
Orbital Angular Momentum ◽  
White Light

Intrinsic and Extrinsic Nature of the Orbital Angular Momentum of a Light Beam

2002 ◽  
Vol 88 (5) ◽  
Author(s):  
A. T. O'Neil ◽  
I. MacVicar ◽  
L. Allen ◽  
M. J. Padgett
Keyword(s):  
Angular Momentum ◽  
Light Beam ◽  
Orbital Angular Momentum

Orbital angular momentum of a high-order Bessel light beam

2002 ◽  
Vol 4 (2) ◽  
pp. S82-S89 ◽  
Author(s):  
K Volke-Sepulveda ◽  
V Garcés-Chávez ◽  
S Chávez-Cerda ◽  
J Arlt ◽  
K Dholakia
Keyword(s):  
Angular Momentum ◽  
Light Beam ◽  
Orbital Angular Momentum ◽  
High Order ◽  
Bessel Light Beam
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