Results 21 to 30 of about 1,705,952 (334)
AIP Advances, 2023 Fractional vortex beams have attracted increasing attention due to their complex yet intriguing physical properties, such as radial notch intensity distribution and higher degrees of modulation in orbital angular momentum.
Xiang Xu +5 more
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Free-space creation of a perfect vortex beam with fractional topological charge.
Optics Express, 2023 Perfect vortex beams can only propagate stably with integer topological charges. Thus, creating perfect fractional vortex beams capable of stable propagation in free space, as perfect integer vortex beams, is crucial.
Guanxue Wang +6 more
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Frontiers in Physics, 2023 This study employs the power spectrum inversion method to generate the phase screens of atmospheric turbulence over the sea, the theoretical model of the vortex beam array emitted by a focusing system through anisotropic non-Kolmogorov maritime ...
Hong Yu +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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Polarization-controllable perfect vortex beam by a dielectric metasurface.
Optics Express, 2021 A perfect vortex beam has been attracting tremendous attention due to the fact that its ring radius is independent of the topological charge. Taking advantage of the superposition principle of phase in Fourier space, we proposed to generate perfect ...
Jianfeng Xie +3 more
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Terahertz vortex beam generator based on bound states in the continuum.
Optics Express, 2021 Vortex beams are playing an increasingly crucial role in wireless optical communications. Traditional vortex beam generators based on spiral phase plates and metasurfaces have a geometric center in real space, which limit their convenience in practical ...
Tairong Bai +5 more
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Calibration-Free Vector Magnetometry Using Nitrogen-Vacancy Center in Diamond Integrated with Optical Vortex Beam. [PDF]
Nano letters (Print), 2020 We report a new method to determine the orientation of individual nitrogen-vacancy (NV) centers in a bulk diamond and use them to realize a calibration-free vector magnetometer with nanoscale resolution. Optical vortex beam is used for optical excitation
Bing Chen +9 more
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Spin-orbit Hall effect in the tight focusing of a radially polarized vortex beam.
Optics Express, 2021 When the first-order radially polarized vortex beam propagates in an uniaxial crystal, the spin and the orbital angular momentum parts can be separated. It is called the optical spin-orbit Hall effect.
Hehe Li +4 more
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Frontiers in Physics, 2022 The probability density analysis formula of the single orbital angular momentum (OAM) mode of an annular vortex beam with a focusing mirror in a turbulent atmosphere is derived theoretically, and the effects of different parameters on the OAM spectrum ...
Jiaxuan Cao +4 more
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Journal of Marine Science and Engineering, 2020 By developing new wave structure function of a beam waves, we derive the transmitting probability of signal vortex modes in oceanic turbulence based on Rytov approximation theory.
Qiyong Liang, Yixin Zhang, Dongyu Yang
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