Sequential harmonic spin–orbit angular momentum generation in nonlinear optical crystals
Light beams carrying multiple orbital angular momentum (OAM) states, which can be realized by the structured media with phase singularities, have attracted great attentions in the fields of high dimensional optical information processing. Alternatively, a simple uniaxial crystal can be used to simul...
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| Format: | Article |
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Institue of Optics and Electronics, Chinese Academy of Sciences
2024-12-01
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| Series: | Opto-Electronic Advances |
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| Online Access: | https://www.oejournal.org/article/doi/10.29026/oea.2024.240138 |
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| author | Yutao Tang Zixian Hu Junhong Deng Kingfai Li Guixin Li |
| author_facet | Yutao Tang Zixian Hu Junhong Deng Kingfai Li Guixin Li |
| author_sort | Yutao Tang |
| collection | DOAJ |
| description | Light beams carrying multiple orbital angular momentum (OAM) states, which can be realized by the structured media with phase singularities, have attracted great attentions in the fields of high dimensional optical information processing. Alternatively, a simple uniaxial crystal can be used to simultaneously generate four OAM states of light through the second harmonic generation and cascaded optical spin–orbit interaction (SOI) processes. However, two of the OAM states realized in the crystal are very weak and limit the practical applications. Here, we aim to circumvent this constraint by using the sequential optical SOI processes in two crystals with threefold rotational symmetry. Four angular momentum states of the fundamental waves are prepared after the first crystal and then are utilized to generate the corresponding second harmonic waves (SHWs) with opposite spin and doubled OAM in the second crystal. Further through a sequential SOI process, totally eight angular momentum states of the SHWs with nearly equal energy are experimentally observed. The proposed methodology may find potential applications in optical communications, parallel optical computing, optical manipulation and so on. |
| format | Article |
| id | doaj-art-d438b68c08504570a2f2ce3dcdfcd82a |
| institution | Kabale University |
| issn | 2096-4579 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Institue of Optics and Electronics, Chinese Academy of Sciences |
| record_format | Article |
| series | Opto-Electronic Advances |
| spelling | doaj-art-d438b68c08504570a2f2ce3dcdfcd82a2025-01-24T06:20:29ZengInstitue of Optics and Electronics, Chinese Academy of SciencesOpto-Electronic Advances2096-45792024-12-017121910.29026/oea.2024.240138OEA-2024-0138LiguixinSequential harmonic spin–orbit angular momentum generation in nonlinear optical crystalsYutao Tang0Zixian Hu1Junhong Deng2Kingfai Li3Guixin Li4Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, ChinaDepartment of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, ChinaDepartment of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, ChinaDepartment of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, ChinaDepartment of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, ChinaLight beams carrying multiple orbital angular momentum (OAM) states, which can be realized by the structured media with phase singularities, have attracted great attentions in the fields of high dimensional optical information processing. Alternatively, a simple uniaxial crystal can be used to simultaneously generate four OAM states of light through the second harmonic generation and cascaded optical spin–orbit interaction (SOI) processes. However, two of the OAM states realized in the crystal are very weak and limit the practical applications. Here, we aim to circumvent this constraint by using the sequential optical SOI processes in two crystals with threefold rotational symmetry. Four angular momentum states of the fundamental waves are prepared after the first crystal and then are utilized to generate the corresponding second harmonic waves (SHWs) with opposite spin and doubled OAM in the second crystal. Further through a sequential SOI process, totally eight angular momentum states of the SHWs with nearly equal energy are experimentally observed. The proposed methodology may find potential applications in optical communications, parallel optical computing, optical manipulation and so on.https://www.oejournal.org/article/doi/10.29026/oea.2024.240138angular momentum of lightnonlinear opticssecond harmonic generationoptical spin–orbit interaction |
| spellingShingle | Yutao Tang Zixian Hu Junhong Deng Kingfai Li Guixin Li Sequential harmonic spin–orbit angular momentum generation in nonlinear optical crystals Opto-Electronic Advances angular momentum of light nonlinear optics second harmonic generation optical spin–orbit interaction |
| title | Sequential harmonic spin–orbit angular momentum generation in nonlinear optical crystals |
| title_full | Sequential harmonic spin–orbit angular momentum generation in nonlinear optical crystals |
| title_fullStr | Sequential harmonic spin–orbit angular momentum generation in nonlinear optical crystals |
| title_full_unstemmed | Sequential harmonic spin–orbit angular momentum generation in nonlinear optical crystals |
| title_short | Sequential harmonic spin–orbit angular momentum generation in nonlinear optical crystals |
| title_sort | sequential harmonic spin orbit angular momentum generation in nonlinear optical crystals |
| topic | angular momentum of light nonlinear optics second harmonic generation optical spin–orbit interaction |
| url | https://www.oejournal.org/article/doi/10.29026/oea.2024.240138 |
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