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Generation and focusing of a second-order vector beam using a subwavelength optical element
S.A. Degtyarev 1,2, D.A. Savelyev 1,2

1 IPSI RAS – Branch of the FSRC "Crystallography and Photonics" RAS,
443001, Samara, Russia, Molodogvardeyskaya 151,
2 Samara National Research University, 443086, Samara, Russia, Moskovskoye Shosse 34

 PDF, 1220 kB

DOI: 10.18287/2412-6179-CO-1053

Pages: 39-47.

Full text of article: Russian language.

Abstract:
This article proposes a new type of subwavelength axicons for creating and focusing second-order vector cylindrical beams. It is also shown that using the proposed subwavelength axicons, it is possible to create focal spots with an energy backflow. The Comsol Multiphysics software is used to simulate the operation of subwavelength axicons with different twist angles. The dependence of the obtained intensity distributions on the angle of twist of the axicon spiral is investigated.

Keywords:
subwavelength axicons, vector cylindrical beams, finite element method, backflow, Comsol Multiphysics.

Citation:
Degtyarev SA, Savelyev DA. Generation and focusing of a second-order vector beam using a subwavelength optical element. Computer Optics 2022; 46(1): 39-47. DOI: 10.18287/2412-6179-CO-1053.

Acknowledgements:
This work was supported by funding from the Samara University Development Program for 2021-2030 within the framework of the Priority-2030 program in the Introduction part and the Russian Science Foundation (project No. 20-72-00051) in the remaining parts.

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