Arbitrary-Order and Multichannel Optical Vortices with Simultaneous Amplitude and Phase Modulation on Plasmonic Metasurfaces
The highly localized and uneven spatial distribution of the subwavelength light field in metal metasurfaces provides a promising means for the generation of optical vortices (OVs) with arbitrary topological charges. In this paper, a simple and reliable way for generating multichannel OVs on gold nan...
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MDPI AG
2022-10-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/19/3476 |
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| author | Qing’an Sun Wangying Yang Lei Jin Jingcheng Shangguan Yilin Wang Tong Cui Kun Liang Li Yu |
| author_facet | Qing’an Sun Wangying Yang Lei Jin Jingcheng Shangguan Yilin Wang Tong Cui Kun Liang Li Yu |
| author_sort | Qing’an Sun |
| collection | DOAJ |
| description | The highly localized and uneven spatial distribution of the subwavelength light field in metal metasurfaces provides a promising means for the generation of optical vortices (OVs) with arbitrary topological charges. In this paper, a simple and reliable way for generating multichannel OVs on gold nanoporous metasurfaces is reported. The instantaneous field of arbitrary-order OVs can be regulated and concentrated on the same focal surface by adapting photonic spin–orbit interaction (SOI) and geometric phase. The focal ring energy distribution of OVs along the conical propagation path is accurately calculated, and the double phase of units induced by spin rotation is confirmed. Based on the parameter optimization of the nanohole arrangement, the simultaneous amplitude and phase modulation of multichannel OVs has been realized. Furthermore, the average multichannel signal-to-noise ratio exceeds 15 dB, which meets the requirements of high resolution and low crosstalk. Our study obtains broadband and efficient OVs, which can contribute to improving the capacity storage and security of optical information and possess great application prospects in beam shaping, optical tweezers, and communication coding. |
| first_indexed | 2024-03-09T21:20:50Z |
| format | Article |
| id | doaj.art-6bbdf28bfd43442d9851b660ce0f569f |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T21:20:50Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
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| series | Nanomaterials |
| spelling | doaj.art-6bbdf28bfd43442d9851b660ce0f569f2023-11-23T21:20:42ZengMDPI AGNanomaterials2079-49912022-10-011219347610.3390/nano12193476Arbitrary-Order and Multichannel Optical Vortices with Simultaneous Amplitude and Phase Modulation on Plasmonic MetasurfacesQing’an Sun0Wangying Yang1Lei Jin2Jingcheng Shangguan3Yilin Wang4Tong Cui5Kun Liang6Li Yu7State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, ChinaState Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, ChinaState Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, ChinaState Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, ChinaCollege of Mathematics and Physics, Beijing University of Chemical Technology, Beijing 100029, ChinaState Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University, Beijing 100084, ChinaState Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, ChinaState Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, ChinaThe highly localized and uneven spatial distribution of the subwavelength light field in metal metasurfaces provides a promising means for the generation of optical vortices (OVs) with arbitrary topological charges. In this paper, a simple and reliable way for generating multichannel OVs on gold nanoporous metasurfaces is reported. The instantaneous field of arbitrary-order OVs can be regulated and concentrated on the same focal surface by adapting photonic spin–orbit interaction (SOI) and geometric phase. The focal ring energy distribution of OVs along the conical propagation path is accurately calculated, and the double phase of units induced by spin rotation is confirmed. Based on the parameter optimization of the nanohole arrangement, the simultaneous amplitude and phase modulation of multichannel OVs has been realized. Furthermore, the average multichannel signal-to-noise ratio exceeds 15 dB, which meets the requirements of high resolution and low crosstalk. Our study obtains broadband and efficient OVs, which can contribute to improving the capacity storage and security of optical information and possess great application prospects in beam shaping, optical tweezers, and communication coding.https://www.mdpi.com/2079-4991/12/19/3476optical vortextopological chargespin–orbit interactiongeometric phase |
| spellingShingle | Qing’an Sun Wangying Yang Lei Jin Jingcheng Shangguan Yilin Wang Tong Cui Kun Liang Li Yu Arbitrary-Order and Multichannel Optical Vortices with Simultaneous Amplitude and Phase Modulation on Plasmonic Metasurfaces Nanomaterials optical vortex topological charge spin–orbit interaction geometric phase |
| title | Arbitrary-Order and Multichannel Optical Vortices with Simultaneous Amplitude and Phase Modulation on Plasmonic Metasurfaces |
| title_full | Arbitrary-Order and Multichannel Optical Vortices with Simultaneous Amplitude and Phase Modulation on Plasmonic Metasurfaces |
| title_fullStr | Arbitrary-Order and Multichannel Optical Vortices with Simultaneous Amplitude and Phase Modulation on Plasmonic Metasurfaces |
| title_full_unstemmed | Arbitrary-Order and Multichannel Optical Vortices with Simultaneous Amplitude and Phase Modulation on Plasmonic Metasurfaces |
| title_short | Arbitrary-Order and Multichannel Optical Vortices with Simultaneous Amplitude and Phase Modulation on Plasmonic Metasurfaces |
| title_sort | arbitrary order and multichannel optical vortices with simultaneous amplitude and phase modulation on plasmonic metasurfaces |
| topic | optical vortex topological charge spin–orbit interaction geometric phase |
| url | https://www.mdpi.com/2079-4991/12/19/3476 |
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