Results 31 to 40 of about 34,816 (291)
Bidirectional Terahertz Vortex Beam Regulator
Materials, 2022 Most of the reported vortex beam generators with orbital angular momentum (OAM) in the terahertz region only operate in either the reflection mode or the transmission mode, which greatly limits the integration and application in terahertz technology systems. Herein, we propose a full-space vortex beam regulator at two different frequencies. By changing
Li, Jiusheng +3 more
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Divergence of optical vortex beams [PDF]
Applied Optics, 2015 4 pages, 4 ...
Reddy, Salla Gangi +5 more
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Conical Emission Induced by the Filamentation of Femtosecond Vortex Beams in Water
Applied Sciences, 2023 Conical emission is a typical nonlinear phenomenon that occurs during the filamentation of femtosecond laser pulses in transparent media. In this work, the conical emission induced by two kinds of typical vortex beams (i.e., Laguerre–Gaussian (LG) and ...
Yang Liu +6 more
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Integrated optical vortex beam receivers [PDF]
Optics Express, 2016 A simple and ultra-compact integrated optical vortex beam receiver device is presented. The device is based on the coupling between the optical vortex modes and whispering gallery modes in a micro-ring resonator via embedded angular gratings, which provides the selective reception of optical vortex modes with definitive total angular momentum ...
Cicek, Kenan +11 more
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Propagation and Transformation of Vortexes in Linear and Nonlinear Radio-Photon Systems
Fibers, 2022 The article is devoted to issues related to the propagation and transformation of vortexes in the optical range of frequency. Within the framework of the traditional and modified model of slowly varying envelope approximation (SVEA), the process of ...
Valery H. Bagmanov +5 more
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Second-Harmonic Generation of the Vortex Beams with Integer and Fractional Topological Charges
Photonics, 2023 The single-pass second-harmonic generation (SHG) of a vortex beam under low fundamental wave depletion is systematically studied. Vortex modes at 1064 nm with integer topological charges from ±1 to ±9 and fractional ones at ±0.75 are generated by ...
Shirui Zhang +5 more
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Terahertz circular Airy vortex beams [PDF]
Scientific Reports, 2017 AbstractVortex beams have received considerable research interests both in optical and millimeter-wave domain since its potential to be utilized in the wireless communications and novel imaging systems. Many well-known optical beams have been demonstrated to carry orbital angular momentum (OAM), such as Laguerre-Gaussian beams and high-order Bessel ...
Changming Liu +5 more
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Nonlinear vortex light beams supported and stabilized by dissipation
, 2017 We describe nonlinear Bessel vortex beams as localized and stationary solutions with embedded vorticity to the nonlinear Schr\"odinger equation with a dissipative term that accounts for the multi-photon absorption processes taking place at high enough ...
A Couairon +55 more
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Results in Physics, 2023 This paper presents an innovative form of the symmetric and autofocusing beam in theory and experiment. These symmetric Olver beams (SOBs) originate from the spectral symmetry phase of the Olver beams.
Yidan Sun +7 more
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Vortex preserving statistical optical beams
Optics Express, 2020 We establish a general form of the cross-spectral density of statistical sources that generate vortex preserving partially coherent beams on propagation through any linear ABCD optical system. We illustrate our results by introducing a class of partially coherent vortex beams with a closed form cross-spectral density at the source and demonstrating the
Zhiheng Xu +5 more
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