Controlling the orbital angular momentum of high harmonic vortices
Sign Up to like & getrecommendations! 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
Sign Up to like & getrecommendations! 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
A High-Gain Transmitarray for Generating Dual-Mode OAM Beams
Sign Up to like & getrecommendations! 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
Sign Up to like & getrecommendations! 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
Attenuation of Orbital Angular Momentum Beam Transmission With a Parabolic Antenna
Sign Up to like & getrecommendations! 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
Dynamic shaping of orbital-angular-momentum beams for information encoding.
Sign Up to like & getrecommendations! 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
Sign Up to like & getrecommendations! 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.
Sign Up to like & getrecommendations! 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
Retrieving Performances of Vortex Beams with GS Algorithm after Transmitting in Different Types of Turbulences
Sign Up to like & getrecommendations! Published in 2019 at "Applied Sciences"
DOI: 10.3390/app9112269
Abstract: The transmission of the orbital angular momentum (OAM) beam has attracted a lot of attention in the field of free-space optical (FSO) communication. Usually, after transmitting in atmospheric turbulences, the helical phase-front of OAM beams… read more here.
Keywords: oam beams; turbulence strength; retrieving performances; performances vortex ... See more keywords