Results 31 to 40 of about 2,764,686 (330)

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, Xianfei Hou, Feifei Ge, Xiaohan Zhang, Yun-Lan Ji, Hongju Li, Peng Qian, Ya Wang, Nanyang Xu, Jiangfeng Du   +9 more
semanticscholar   +1 more source

Effects of Turbulence on the Vortex Modes Carried by Quasi-Diffracting Free Finite Energy Beam in Ocean

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
doaj   +1 more source

Mitigating the cross talk of orbital angular momentum modes in free-space optical communication by using an annular vortex beam and a focusing mirror

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, Huijian Liang, Yunqin Zhou, Gaofeng Wu, Xiaoyan Pang   +4 more
doaj   +1 more source

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, Qian Li, Yiqing Wang, Yifan Chen, Zheng-Da Hu, Jicheng Wang   +5 more
semanticscholar   +1 more source

Divergence of optical vortex beams [PDF]

Applied Optics, 2015
4 pages, 4 ...
Reddy, Salla Gangi, P, Chithrabhanu, Prabhakar, Shashi, Anwar, Ali, Banerji, J., Singh, R. P.   +5 more
openaire   +3 more sources

Vortex strength and beam propagation factor of fractional vortex beams

Optics Express, 2019
9 pages, 5 ...
Jisen Wen, Li-Gang Wang, Xihua Yang, Junxiang Zhang, Shi-Yao Zhu   +4 more
openaire   +3 more sources

Optical trapping with a perfect vortex beam [PDF]

, 2014
The authors would like to thank the UK Engineering and Physical Sciences Research Council (EPSRC) for funding.Vortex beams with different topological charge usually have different profiles and radii of peak intensity.
Arita, Yoshihiko, Ewan M. Wright, Wright, Ewan M., Michael Mazilu, Chen, Mingzhou, Mazilu, Michael, Dholakia, Kishan, Yoshihiko Arita, Mingzhou Chen, Kishan Dholakia   +9 more
core   +1 more source

Topological charge of optical vortices in the far field with an initial fractional charge: optical "dipoles"

Компьютерная оптика, 2022
In this work, using the Rayleigh-Sommerfeld integral and the Berry formula, the topological charge (TC) of a Gaussian optical vortex with an initial fractional TC is calculated. It is shown that for different fractional parts of the TС, the beam contains
A.G. Nalimov, V.V. Kotlyar
doaj   +1 more source

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.
He-He Li, Chenghao Ma, Jing-Ge Wang, Miao-Miao Tang, Xin-Zhong Li   +4 more
semanticscholar   +1 more source

Synthesis and Measurement of a Circular-Polarized Deflection OAM Vortex Beam With Sidelobe Suppression Array

IEEE Access, 2020
In this paper, a chamfer distribution antenna array is designed to generate a deflecting circular-polarized vortex beam carrying orbital angular momentum (OAM) mode.
Jun Liang, Zhongliang Jing, Qiang Feng, Yushan Zheng, Long Li   +4 more
doaj   +1 more source