A metalens for detecting fractional-order optical vortices
In this work, a metalens for detecting an incident field with a fractional topological charge ranging from – 2 to 0 is proposed. The metalens is based on a spiral zone plate with a topological charge of 1.5. A change in the topological charge of the incident beam is numerically shown to lead to an o...
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| Format: | Article |
| Language: | English |
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Samara National Research University
2024-06-01
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| Series: | Компьютерная оптика |
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| Online Access: | https://www.computeroptics.ru/eng/KO/Annot/KO48-3/480303e.html |
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| author | A.G. Nalimov V.V. Kotlyar Y.V. Khanenko S.D. Poletaev |
| author_facet | A.G. Nalimov V.V. Kotlyar Y.V. Khanenko S.D. Poletaev |
| author_sort | A.G. Nalimov |
| collection | DOAJ |
| description | In this work, a metalens for detecting an incident field with a fractional topological charge ranging from – 2 to 0 is proposed. The metalens is based on a spiral zone plate with a topological charge of 1.5. A change in the topological charge of the incident beam is numerically shown to lead to an off-axis shift of the focal spot from the center, with the intensity maximum value also changing. This results in a 6.9-fold change in the on-axis intensity while the topological charge of the incident beam changes from –0.6 to –1.5. The on-axis intensity at the focus is also shown to be affected by the rotation of the fractional vortex beam. This makes it possible to use the proposed metalens for measuring the angle of rotation of the incident beam in the range from 0 to 110°. |
| format | Article |
| id | doaj-art-7a037f8904d14119b7c8f3b8cc5b12da |
| institution | Kabale University |
| issn | 0134-2452 2412-6179 |
| language | English |
| publishDate | 2024-06-01 |
| publisher | Samara National Research University |
| record_format | Article |
| series | Компьютерная оптика |
| spelling | doaj-art-7a037f8904d14119b7c8f3b8cc5b12da2025-02-05T12:06:22ZengSamara National Research UniversityКомпьютерная оптика0134-24522412-61792024-06-0148334234810.18287/2412-6179-CO-1435A metalens for detecting fractional-order optical vorticesA.G. Nalimov0V.V. Kotlyar1Y.V. Khanenko2S.D. Poletaev3Image Processing Systems Institute, NRC "Kurchatov Institute"; Samara National Research UniversityImage Processing Systems Institute, NRC "Kurchatov Institute"; Samara National Research UniversityImage Processing Systems Institute, NRC "Kurchatov Institute"; Samara National Research UniversityImage Processing Systems Institute, NRC "Kurchatov Institute"; Samara National Research UniversityIn this work, a metalens for detecting an incident field with a fractional topological charge ranging from – 2 to 0 is proposed. The metalens is based on a spiral zone plate with a topological charge of 1.5. A change in the topological charge of the incident beam is numerically shown to lead to an off-axis shift of the focal spot from the center, with the intensity maximum value also changing. This results in a 6.9-fold change in the on-axis intensity while the topological charge of the incident beam changes from –0.6 to –1.5. The on-axis intensity at the focus is also shown to be affected by the rotation of the fractional vortex beam. This makes it possible to use the proposed metalens for measuring the angle of rotation of the incident beam in the range from 0 to 110°.https://www.computeroptics.ru/eng/KO/Annot/KO48-3/480303e.htmltopological chargefractional optical vortexmultifocal metalens |
| spellingShingle | A.G. Nalimov V.V. Kotlyar Y.V. Khanenko S.D. Poletaev A metalens for detecting fractional-order optical vortices Компьютерная оптика topological charge fractional optical vortex multifocal metalens |
| title | A metalens for detecting fractional-order optical vortices |
| title_full | A metalens for detecting fractional-order optical vortices |
| title_fullStr | A metalens for detecting fractional-order optical vortices |
| title_full_unstemmed | A metalens for detecting fractional-order optical vortices |
| title_short | A metalens for detecting fractional-order optical vortices |
| title_sort | metalens for detecting fractional order optical vortices |
| topic | topological charge fractional optical vortex multifocal metalens |
| url | https://www.computeroptics.ru/eng/KO/Annot/KO48-3/480303e.html |
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