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   Articles with "oam beams" as a keyword



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Controlling the orbital angular momentum of high harmonic vortices

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recommendations! Published in 2017 at "Nature Communications"

DOI: 10.1038/ncomms14970

Abstract: Optical vortices, which carry orbital angular momentum (OAM), can be flexibly produced and measured with infrared and visible light. Their application is an important research topic for super-resolution imaging, optical communications and quantum optics. However,… read more here.

Keywords: oam beams; controlling orbital; angular momentum; orbital angular ... See more keywords

Beam steering for OAM beams using time-modulated circular arrays

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recommendations! Published in 2018 at "Electronics Letters"

DOI: 10.1049/el.2018.5386

Abstract: The theory of time-modulated circular arrays in respect of generating orbital angular momentum (OAM) beams at harmonic frequencies is analysed. Without using expensive phase shifters in phased arrays, beam steering for OAM beams is achieved… read more here.

Keywords: beam steering; oam beams; time modulated; modulated circular ... See more keywords

Manipulating terahertz wavefront for tri-channel holograms and OAM beams based on diatomic metasurfaces

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recommendations! Published in 2025 at "Physica Scripta"

DOI: 10.1088/1402-4896/add187

Abstract: Metasurfaces possess powerful wavefront manipulation capabilities that are unattainable by traditional optical devices. They demonstrate the remarkable control over amplitude, phase, and polarization while ensuring compactness and miniaturization. This provides an innovative approach to attaining… read more here.

Keywords: holograms oam; manipulating terahertz; tri channel; channel ... See more keywords

A High-Gain Transmitarray for Generating Dual-Mode OAM Beams

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recommendations! Published in 2018 at "IEEE Access"

DOI: 10.1109/access.2018.2875680

Abstract: This paper proposes a novel transmitarray antenna which can achieve high gain and produce dual-mode orbital angular momentum (OAM) beams in Ku-band. Two back-to-back wideband dual-polarized microstrip antennas are employed as the unit cells, which… read more here.

Keywords: mode oam; oam beams; gain; dual mode ... See more keywords

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

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recommendations! Published in 2019 at "IEEE Photonics Journal"

DOI: 10.1109/jphot.2019.2899236

Abstract: Orbital angular momentum (OAM) beams can be generated at many microwave frequencies by using antenna array. However, the complexity of the system and inability to transmit over long distances limit the applications of OAM beams… read more here.

Keywords: array; antenna array; oam beams; ceramic antenna ... See more keywords
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Attenuation of Orbital Angular Momentum Beam Transmission With a Parabolic Antenna

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recommendations! Published in 2021 at "IEEE Antennas and Wireless Propagation Letters"

DOI: 10.1109/lawp.2021.3094978

Abstract: In order to evaluate the transmission performance of orbital angular momentum (OAM) beams with a parabolic antenna, this letter investigates the attenuation of OAM beams reflected by the parabolic reflector. Specifically, the system structure and… read more here.

Keywords: oam beams; transmission; angular momentum; parabolic antenna ... See more keywords

Anisotropic Bilayer Transmissive Huygens Metasurface for Generating Multi-OAM Beams With Orthogonal Modes and Polarizations

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recommendations! Published in 2025 at "IEEE Antennas and Wireless Propagation Letters"

DOI: 10.1109/lawp.2024.3501371

Abstract: This letter proposes a bilayer transmissive Huygens metasurface with an independent phase response for two orthogonal polarizations to generate two distinct modes of orbital angular momentum (OAM) beams. The performance of the proposed unit cell… read more here.

Keywords: bilayer transmissive; oam beams; tex math; inline formula ... See more keywords

A Broadband Transmissive Metasurface for Non-Diffractive THz OAM Multiplexing and Communication

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recommendations! Published in 2024 at "IEEE Transactions on Antennas and Propagation"

DOI: 10.1109/tap.2024.3362374

Abstract: Terahertz (THz) orbital angular momentum (OAM) beams have tremendous potential for tackling the capacity crunch in high-speed wireless communication. However, conventional OAM beams suffer from the limitations of beam divergence and stringent alignment requirements in… read more here.

Keywords: non diffractive; thz; communication; oam beams ... See more keywords

Dynamic shaping of orbital-angular-momentum beams for information encoding.

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recommendations! Published in 2018 at "Optics express"

DOI: 10.1364/oe.26.001796

Abstract: Shaping complex fields with a digital micromirror device (DMD) has attracted much attention recently due to its potential application in optical communication and microscopy. In this paper, we present an optimized Lee method to achieve… read more here.

Keywords: oam beams; shaping orbital; angular momentum; information encoding ... See more keywords

Polarized deep diffractive neural network for classification, generation, multiplexing and de-multiplexing of orbital angular momentum modes

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recommendations! Published in 2022 at "Optics express"

DOI: 10.1364/oe.463137

Abstract: The multiplexing and de-multiplexing of orbital angular momentum (OAM) beams are critical issues in optical communication. Optical diffractive neural networks have been introduced to perform sorting, generation, multiplexing, and de-multiplexing of OAM beams. However, conventional… read more here.

Keywords: neural network; network; multiplexing multiplexing; diffractive neural ... See more keywords

Non-diffracting states at exceptional points.

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recommendations! Published in 2021 at "Optics letters"

DOI: 10.1364/ol.411999

Abstract: We propose to use exceptional points (EPs) to construct diffraction-free beam propagation and localized power oscillation in lattices. We specifically consider two systems to utilize EPs for diffraction-free beam propagation, one in synthetic gauge lattices… read more here.

Keywords: states exceptional; exceptional points; oam beams; beam propagation ... See more keywords