Zobrazeno 1 - 10
of 8 358
pro vyhledávání: '"OPTICAL VORTEX"'
Autor:
Ali Mehdinejad
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-14 (2024)
Abstract We explore the dynamics of nonlinear parametric generation and light beam propagation in a Landau-quantized graphene structure with three energy levels interacting with two laser pulses, utilizing the Maxwell-Bloch equations. By applying a l
Externí odkaz:
https://doaj.org/article/dbb61de9fb1a42c79093074b2ebe899e
Autor:
Nourshargh Camron, Xu Alec, Salter Patrick S., Booth Martin J., Elston Steve J., Morris Stephen M.
Publikováno v:
Nanophotonics, Vol 13, Iss 17, Pp 3091-3099 (2024)
In this work, we demonstrate the use of two-photon polymerization direct laser writing in the production of continuously tuneable optical vortex beam (OV) generators in a liquid crystal (LC) layer sandwiched between glass substrates. Results are pres
Externí odkaz:
https://doaj.org/article/1895d707277c4860a978c99f27abbdcb
Akademický článek
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Publikováno v:
IEEE Photonics Journal, Vol 16, Iss 1, Pp 1-9 (2024)
Aiming at the propagation of asymmetric vortex beam, we investigate the spreading and wander characteristics of asymmetric Bessel-Gaussian beam in oceanic turbulence. Based on the cross-spectral density and Wigner distribution function of beam field,
Externí odkaz:
https://doaj.org/article/62c4d0ba183743f3a66802e84d4b4a1a
Publikováno v:
IEEE Photonics Journal, Vol 16, Iss 1, Pp 1-6 (2024)
This paper presents the design, simulation, and experimental validation of a Perfect Optical Vortex (POV) sorter using a novel approach based on a binary Dammann Grating. POV beams, crucial for applications in communication and quantum systems, have
Externí odkaz:
https://doaj.org/article/6323fcb98ff74cd6b15a79e8b887684f
Publikováno v:
Photonics, Vol 11, Iss 8, p 709 (2024)
Optical vortex lattices (OVLs) with diverse modes show potential for a wide range of applications, such as high-capacity optical communications, optical tweezers, and optical measurements. However, vortices in typical regulated OVLs often exhibit irr
Externí odkaz:
https://doaj.org/article/92f55180d76447b19ae8226023bb2f03
Publikováno v:
Advanced Photonics Research, Vol 5, Iss 5, Pp n/a-n/a (2024)
Herein, it is demonstrated that ultrashort spatially structured beams can sculpt a sample of gas‐phase molecules like a 4D material to produce a spatial pattern of aligned molecules whose shape and temporal evolution allow to restore the spatial li
Externí odkaz:
https://doaj.org/article/187c62894a284ea3962d6195117faa0a
Publikováno v:
Nanophotonics, Vol 12, Iss 22, Pp 4239-4254 (2023)
Optical vortices (OVs) have rapidly varying spatial phase and optical energy that circulates around points or lines of zero optical intensity. Manipulation of OVs offers innovative approaches for various fields, such as optical sensing, communication
Externí odkaz:
https://doaj.org/article/f68906593ee046788965f6843fcce2aa
Publikováno v:
Opto-Electronic Science, Vol 2, Iss 7, Pp 1-19 (2023)
Hall effect of light is a result of symmetry breaking in spin and/or orbital angular momentum (OAM) possessing optical system and is caused by e.g. refractive index gradient/interface between media or focusing of a spatially asymmetrical beam, simila
Externí odkaz:
https://doaj.org/article/3a2e826faa534ef9a7a7b23516e1ed12
Publikováno v:
Компьютерная оптика, Vol 47, Iss 3, Pp 367-373 (2023)
It is shown that a squared Laguerre-Gaussian (LG) vortex beam is Fourier-invariant and retains its structure at the focus of a spherical lens. In the Fresnel diffraction zone, such a beam is transformed into superposition of conventional LG beams, th
Externí odkaz:
https://doaj.org/article/5a8b9b4f647d47c8be2cf1d3e53cacde