期刊
PHYSICAL REVIEW A
卷 103, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.103.063502
关键词
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资金
- Russian Foundation for Basic Research [18-29-20003]
- Russian Science Foundation [18-19-00595]
- RF Ministry of Science and Higher Education under a government project of the FSRC Crystallography and Photonics RAS (the section on Gaussian beam with a vortex-argument Bessel function)
This study investigates multivortex beams with infinite topological charge and explores their characteristics and changes. Increasing the waist radius of the Gaussian beam leads to a parabolic growth in the orbital angular momentum of such beams.
In this work, we investigate multivortex beams with an infinite topological charge. Such optical vortices contain an array of an infinite, but countable, number of phase singularities (isolated intensity nulls), which typically have the unitary topological charge and are located either uniformly (or not uniformly) on a straight line (or on several crossing straight lines) in the beam transverse cross section. Such optical vortices are form invariant and their transverse intensity distribution is conserved on propagation, changing only in scale and rotation. The orbital angular momentum of such optical vortices is finite, since only a finite number of screw dislocations is located within the area of the notable intensity of the Gaussian beam, while the other phase singularities are in the periphery (and in the infinity), where the intensity is very small. Increasing the Gaussian beam waist radius leads to a parabolic growth of the orbital angular momentum of such beams.
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