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Optics-to-THz conversion of vortex beams using nonlinear difference frequency generation

V.Kh. Bagmanov1, A.Kh. Sultanov1, A.R. Gizatulin1, I.K. Meshkov1, I.A. Kuk1, E.P. Grakhova1, G.I. Abdrakhmanova1, I.L. Vinogradova1

1 Ufa State Aviation Technical University, Ufa, Russia

 PDF, 1000 kB

DOI: 10.18287/2412-6179-2019-43-6-983-991

Pages: 983-991.

Full text of article: Russian language.

Abstract:
In this paper, using a modified model of slowly varying amplitudes, a process of optics-to-THZ-conversion of vortex beams based on the nonlinear difference frequency generation in a medium with second-order susceptibility is considered. A theoretical substantiation of the law of topological charge conversion of vortex beams is given – the topological charge of the output THz vortex beam is equal to the difference of the topological charges of the input optical vortex beams. A simulation model of the processes under consideration is implemented.

Keywords:
differential frequency generation, nonlinear medium, vortex beams conversion.

Citation:
Bagmanov VKh, Sultanov AKh, Gizatulin AR, Meshkov IK, Kuk IA, Grakhova EP, Abdrakhmanova GI, Vinogradova IL. Optics-to-THz-conversion of vortex beams using nonlinear difference frequency generation. Computer Optics 2019; 43(6): 983-991. DOI: 10.18287/2412-6179-2019-43-6-983-991.

Acknowledgements:
The work was funded by the Russian Science Foundation under grant No. 18-19-00123.

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