학술논문
Propagation-invariant infinite-topological-charge cosine vortex laser beams
Document Type
Conference
Author
Source
2021 International Conference on Information Technology and Nanotechnology (ITNT) Information Technology and Nanotechnology (ITNT), 2021 International Conference on. :1-6 Sep, 2021
Subject
Language
Abstract
Here, a new solution is obtained of the paraxial Helmoltz equation, which describes form-invariant beams with an infinite topological charge. Transverse intensity distribution of such beams does not change on propagation in free space, but it changes in scale and rotates by an angle up to $\pi/2$ (in the far field). It is shown that the orbital angular momentum of such beams is finite, eventhough the topological charge is infinite.