Fundamentals of Orbital Angular Momentum Beams

Papathanasopoulos, Anastasios; Rahmat‐Samii, Y.

doi:10.1002/9781119662945.ch1

Cited by 3 publications

(4 citation statements)

References 108 publications

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“…It has been shown [21,22] that light diffraction from an occulting disk could lead to a dark Arago-Poisson spot instead of a bright one. For this to occur, the usual plane wave has to be replaced by a vortex beam [23][24][25]. Briefly, such vortex beams carry Orbital Angular Momentum (OAM) and have a non-uniform phase distribution.…”

Section: Theoretical Considerationsmentioning

confidence: 99%

“…This could have interesting applications in atom optics in the realization of atom guides and atomic funnels [36,37], since OAM beams are sometimes difficult to focus due to other modes that may be present in the beam. Besides, focused OAM beams diverge rapidly [25], which is not the case for Arago-Poisson OAM beams (see following Section 2.3.2).…”

Section: Ultimate Arago-poisson Beam Sizementioning

confidence: 99%

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The Arago–Poisson Spot: New Applications for an Old Concept

Emile,

Emile

2024

Photonics

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Herein, we report some specific properties and applications of the so-called Arago–Poisson spot in optics. This spot results from the diffraction of a plane wave by an occulting disk that leads to a small bright spot in its shadow. We discuss some of the properties of such beams. In particular, we focus on the ultimate size that can be reached for these beams, which depends on the diameter of the disk, the wavelength, and the distance from the disk. We also highlight self-healing and faster-than-light properties. Applications are then proposed. The applications mainly deal with new traps with nanometer sizes dedicated to the trapping of nanoparticles. We also discuss beams that change frequency during propagation and their application for signal delivery in a precise and determined area.

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Section: Theoretical Considerationsmentioning

confidence: 99%

Section: Ultimate Arago-poisson Beam Sizementioning

confidence: 99%

The Arago–Poisson Spot: New Applications for an Old Concept

Emile,

Emile

2024

Photonics

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“…In the designed metasurface, the OAM mode of the central disk is taken as + 1, that of the outer ring is +2. When the radius of the outer ring is fixed at R 2 = 100 mm, the inner radius of R 1 is calculated as 65 mm by (7) and (8). At this time, the maximum value of radiation patterns of the two regions occurs at the same angle.…”

Section: Reflective Metasurface Mechanism Of Dual Mode With Equal Div...mentioning

confidence: 99%

“…As a new degree of freedom, OAM beams have great advantages in improving communication capacity and rate, and radar resolution [5,6]. Moreover, the OAM beam divergence is beneficial for applications requiring cone-shaped patterns in the far-field, such as navigation satellite systems with moving vehicle [7,8]. But this is a challenge for long-distance communication.…”

Section: Introductionmentioning

confidence: 99%

A reflective metasurface for generating dual‐mode dual‐polarized high‐order Bessel vortex beams with equal divergence angle

Huang

Guo

et al. 2022

IET Microwaves Antenna & Prop

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A single‐layer reflective metasurface is proposed in this study to generate dual‐mode dual‐polarized high‐order Bessel vortex beams with equal divergence angle in Ka‐band. The metasurface consists of two different subwavelength elements with different polarisations, which are located in the inner disk region and the outer ring region respectively. The inner element, composed of a square ring and a regular octagon, is proposed to achieve a phase response of 360°. The outer element, which consists of a microstrip line and a double W‐shaped line, is designed to achieve the phase compensation and polarization conversion simultaneously. Equal divergence angle of different orbital angular momentum (OAM) modes is achieved by theoretically calculating the radii of the inner and outer regions. The metasurface prototype is fabricated and tested at 29 GHz, and the results show that the high‐order Bessel beams with +1 mode of x‐polarization and +2 mode of y‐polarization are successfully generated. This work provides a simple and practical method to generate dual‐mode dual‐polarized high‐order Bessel vortex beams for high‐capacity OAM communications.

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Series-Fed Dual-Mode OAM Antenna at 6 GHz

Uzun,

Tekin

2024

2024 IEEE International Symposium on Antennas and Propagation and INC/USNC‐URSI Radio Science Meeting (AP-S/INC-USNC-URSI)

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Fundamentals of Orbital Angular Momentum Beams

Cited by 3 publications

References 108 publications

The Arago–Poisson Spot: New Applications for an Old Concept

The Arago–Poisson Spot: New Applications for an Old Concept

A reflective metasurface for generating dual‐mode dual‐polarized high‐order Bessel vortex beams with equal divergence angle

Series-Fed Dual-Mode OAM Antenna at 6 GHz

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