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Volume 25 - ICOP & ICPET 2019                   ICOP & ICPET _ INPC _ ICOFS 2019, 25 - ICOP & ICPET 2019: 241-244 | Back to browse issues page

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Hosseini saber S M A, Rezaei S, Saber A, Ahadi akhlaghi E. Investigating the propagation of vortex beams in the presence of an opaque obstacle . ICOP & ICPET _ INPC _ ICOFS 2019; 25 :241-244
URL: http://opsi.ir/article-1-1908-en.html
1- Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, 45137-66731, Iran
2- Department of Science, University of Mohaghegh Ardabili, Ardabil, 56199-11367, Iran
Abstract:   (1726 Views)

In this article, the propagation of vortex beams in the presence of an opaque obstacle is investigated. The intensity distribution of the diffracted beam due to the edge of the opaque obstacle is simulated using the angular spectrum and Huygens convolution propagation methods. It has been shown that the vortex beams have a relative self-healing property so that the diffracted intensity distribution of these beams are healed asymmetrically through propagation. This phenomenon occurs for a larger topological charge at shorter propagation distances. It has also been shown that the direction of self-healing is related to the topological charge sign, and therefore the use of the diffraction pattern from the edge of the opaque obstacle is a simple and fast way to determine the topological charge sign.

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Type of Study: Research | Subject: Special

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