Reconstruction of stable states of spiral vortex beams
Using an asymptotic approach and an experiment supported by computer simulation, we analyzed processes of restoring structural stability and transitions to new stable states of spiral vortex beams subject to perturbations by curly apertures. Using a tetragonal beam as an example, we considered three...
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| Format: | Article |
| Language: | English |
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Samara National Research University
2022-02-01
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| Series: | Компьютерная оптика |
| Subjects: | |
| Online Access: | https://computeroptics.ru/eng/KO/Annot/KO46-1/460101e.html |
| _version_ | 1797867084290457600 |
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| author | A.V. Volyar E.G. Abramochkin Y.E. Akimova M.V. Bretsko |
| author_facet | A.V. Volyar E.G. Abramochkin Y.E. Akimova M.V. Bretsko |
| author_sort | A.V. Volyar |
| collection | DOAJ |
| description | Using an asymptotic approach and an experiment supported by computer simulation, we analyzed processes of restoring structural stability and transitions to new stable states of spiral vortex beams subject to perturbations by curly apertures. Using a tetragonal beam as an example, we considered three perturbation scenarios: 1) asymmetric perturbation, when an opaque screen covers the caustic only on one side of the square, 2) symmetric perturbation, when the curly aperture covers the entire beam except for a narrow caustic region, and 3) symmetric perturbation, when the curly aperture screens only a narrow region of the caustic without affecting the rest of the beam. At the same time, the asymptotic calculation was carried out for all types of polygonal beams. It was shown that if the curly aperture did not destroy the caustic region of the spiral beam, it was able to self-heal in the far diffraction zone. If the perturbation even locally destroyed a part of the caustics, then the perturbed beam passed into a new stable state through chains of creation and annihilation of optical vortices (dislocation reactions). |
| first_indexed | 2024-04-09T23:35:43Z |
| format | Article |
| id | doaj.art-f7afb43404334eeebeefaa2e805df888 |
| institution | Directory Open Access Journal |
| issn | 0134-2452 2412-6179 |
| language | English |
| last_indexed | 2024-04-09T23:35:43Z |
| publishDate | 2022-02-01 |
| publisher | Samara National Research University |
| record_format | Article |
| series | Компьютерная оптика |
| spelling | doaj.art-f7afb43404334eeebeefaa2e805df8882023-03-20T14:01:07ZengSamara National Research UniversityКомпьютерная оптика0134-24522412-61792022-02-0146151510.18287/2412-6179-CO-1032Reconstruction of stable states of spiral vortex beamsA.V. Volyar0E.G. Abramochkin 1Y.E. Akimova2M.V. Bretsko3Physics and Technology Institute (Academic Unit) of V.I. Vernadsky Crimean Federal UniversityLebedev Physical InstitutePhysics and Technology Institute (Academic Unit) of V.I. Vernadsky Crimean Federal UniversityPhysics and Technology Institute (Academic Unit) of V.I. Vernadsky Crimean Federal UniversityUsing an asymptotic approach and an experiment supported by computer simulation, we analyzed processes of restoring structural stability and transitions to new stable states of spiral vortex beams subject to perturbations by curly apertures. Using a tetragonal beam as an example, we considered three perturbation scenarios: 1) asymmetric perturbation, when an opaque screen covers the caustic only on one side of the square, 2) symmetric perturbation, when the curly aperture covers the entire beam except for a narrow caustic region, and 3) symmetric perturbation, when the curly aperture screens only a narrow region of the caustic without affecting the rest of the beam. At the same time, the asymptotic calculation was carried out for all types of polygonal beams. It was shown that if the curly aperture did not destroy the caustic region of the spiral beam, it was able to self-heal in the far diffraction zone. If the perturbation even locally destroyed a part of the caustics, then the perturbed beam passed into a new stable state through chains of creation and annihilation of optical vortices (dislocation reactions).https://computeroptics.ru/eng/KO/Annot/KO46-1/460101e.htmlstructural stabilityspiral beamvortex spectrum |
| spellingShingle | A.V. Volyar E.G. Abramochkin Y.E. Akimova M.V. Bretsko Reconstruction of stable states of spiral vortex beams Компьютерная оптика structural stability spiral beam vortex spectrum |
| title | Reconstruction of stable states of spiral vortex beams |
| title_full | Reconstruction of stable states of spiral vortex beams |
| title_fullStr | Reconstruction of stable states of spiral vortex beams |
| title_full_unstemmed | Reconstruction of stable states of spiral vortex beams |
| title_short | Reconstruction of stable states of spiral vortex beams |
| title_sort | reconstruction of stable states of spiral vortex beams |
| topic | structural stability spiral beam vortex spectrum |
| url | https://computeroptics.ru/eng/KO/Annot/KO46-1/460101e.html |
| work_keys_str_mv | AT avvolyar reconstructionofstablestatesofspiralvortexbeams AT egabramochkin reconstructionofstablestatesofspiralvortexbeams AT yeakimova reconstructionofstablestatesofspiralvortexbeams AT mvbretsko reconstructionofstablestatesofspiralvortexbeams |