High-Efficiency All-Dielectric Metasurfaces for the Generation and Detection of Focused Optical Vortex for the Ultraviolet Domain
The optical vortex (OV) has drawn considerable attention owing to its tremendous advanced applications, such as optical communication, quantum entanglement, and on-chip detectors. However, traditional OV generators suffer from a bulky configuration and limited performance, especially in the ultravio...
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MDPI AG
2020-08-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/10/16/5716 |
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| author | Ziheng Zhang Tong Li Xiaofei Jiao Guofeng Song Yun Xu |
| author_facet | Ziheng Zhang Tong Li Xiaofei Jiao Guofeng Song Yun Xu |
| author_sort | Ziheng Zhang |
| collection | DOAJ |
| description | The optical vortex (OV) has drawn considerable attention owing to its tremendous advanced applications, such as optical communication, quantum entanglement, and on-chip detectors. However, traditional OV generators suffer from a bulky configuration and limited performance, especially in the ultraviolet range. In this paper, we utilize a large bandgap dielectric material, niobium pentoxide (Nb<sub>2</sub>O<sub>5</sub>), to construct ultra-thin and compact transmission-type metasurfaces to generate and detect the OV at a wavelength of 355 nm. The meta-atom, which operates as a miniature half-wave plate and demonstrates a large tolerance to fabrication error, manipulates the phase of an incident right-handed circular polarized wave with high cross-polarized conversion efficiency (around 86.9%). The phase delay of <inline-formula><math display="inline"><semantics><mi>π</mi></semantics></math></inline-formula> between the orthogonal electric field component is attributed to the anti-parallel magnetic dipoles induced in the nanobar. Besides, focused vortex generation (topological charge <i>l</i> from 1 to 3) and multichannel detection <i>(l</i> from −2 to 2) are demonstrated with high efficiency, up to 79.2%. We envision that our devices of high flexibility may have potential applications in high-performance micron-scale integrated ultraviolet nanophotonics and meta-optics. |
| first_indexed | 2024-03-10T17:16:33Z |
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| id | doaj.art-b759de10cadc4c04a3808037aab5b6b5 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T17:16:33Z |
| publishDate | 2020-08-01 |
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| spelling | doaj.art-b759de10cadc4c04a3808037aab5b6b52023-11-20T10:30:04ZengMDPI AGApplied Sciences2076-34172020-08-011016571610.3390/app10165716High-Efficiency All-Dielectric Metasurfaces for the Generation and Detection of Focused Optical Vortex for the Ultraviolet DomainZiheng Zhang0Tong Li1Xiaofei Jiao2Guofeng Song3Yun Xu4Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaSchool of Physics and Electronic Sciences, Changsha University of Science and Technology, Changsha 410004, ChinaInstitute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaInstitute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaInstitute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaThe optical vortex (OV) has drawn considerable attention owing to its tremendous advanced applications, such as optical communication, quantum entanglement, and on-chip detectors. However, traditional OV generators suffer from a bulky configuration and limited performance, especially in the ultraviolet range. In this paper, we utilize a large bandgap dielectric material, niobium pentoxide (Nb<sub>2</sub>O<sub>5</sub>), to construct ultra-thin and compact transmission-type metasurfaces to generate and detect the OV at a wavelength of 355 nm. The meta-atom, which operates as a miniature half-wave plate and demonstrates a large tolerance to fabrication error, manipulates the phase of an incident right-handed circular polarized wave with high cross-polarized conversion efficiency (around 86.9%). The phase delay of <inline-formula><math display="inline"><semantics><mi>π</mi></semantics></math></inline-formula> between the orthogonal electric field component is attributed to the anti-parallel magnetic dipoles induced in the nanobar. Besides, focused vortex generation (topological charge <i>l</i> from 1 to 3) and multichannel detection <i>(l</i> from −2 to 2) are demonstrated with high efficiency, up to 79.2%. We envision that our devices of high flexibility may have potential applications in high-performance micron-scale integrated ultraviolet nanophotonics and meta-optics.https://www.mdpi.com/2076-3417/10/16/5716dielectric metasurfacepolarization conversionoptical vortexniobium pentoxide |
| spellingShingle | Ziheng Zhang Tong Li Xiaofei Jiao Guofeng Song Yun Xu High-Efficiency All-Dielectric Metasurfaces for the Generation and Detection of Focused Optical Vortex for the Ultraviolet Domain Applied Sciences dielectric metasurface polarization conversion optical vortex niobium pentoxide |
| title | High-Efficiency All-Dielectric Metasurfaces for the Generation and Detection of Focused Optical Vortex for the Ultraviolet Domain |
| title_full | High-Efficiency All-Dielectric Metasurfaces for the Generation and Detection of Focused Optical Vortex for the Ultraviolet Domain |
| title_fullStr | High-Efficiency All-Dielectric Metasurfaces for the Generation and Detection of Focused Optical Vortex for the Ultraviolet Domain |
| title_full_unstemmed | High-Efficiency All-Dielectric Metasurfaces for the Generation and Detection of Focused Optical Vortex for the Ultraviolet Domain |
| title_short | High-Efficiency All-Dielectric Metasurfaces for the Generation and Detection of Focused Optical Vortex for the Ultraviolet Domain |
| title_sort | high efficiency all dielectric metasurfaces for the generation and detection of focused optical vortex for the ultraviolet domain |
| topic | dielectric metasurface polarization conversion optical vortex niobium pentoxide |
| url | https://www.mdpi.com/2076-3417/10/16/5716 |
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