Gallium nitride-based geometric and propagation metasurfaces for vortex beam emissions
This work experimentally demonstrates the highly-efficient geometric and propagation metasurfaces for vortex beam emissions. These metasurfaces are respectively composed of high-aspect-ratio fin-like and cylindrical gallium nitride (GaN) meta-atoms. Remarkably, the optimized configuration of the fin...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-02-01
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| Series: | Heliyon |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844024014671 |
| _version_ | 1827348280994955264 |
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| author | Meng-Hsin Chen Yan-Liang Liu Vin-Cent Su |
| author_facet | Meng-Hsin Chen Yan-Liang Liu Vin-Cent Su |
| author_sort | Meng-Hsin Chen |
| collection | DOAJ |
| description | This work experimentally demonstrates the highly-efficient geometric and propagation metasurfaces for vortex beam emissions. These metasurfaces are respectively composed of high-aspect-ratio fin-like and cylindrical gallium nitride (GaN) meta-atoms. Remarkably, the optimized configuration of the fin-like GaN meta-atoms achieves a cross-polarization transmission efficiency of up to 99 %. Similarly, the cylindrical GaN meta-atoms exhibit an average co-polarization transmission efficiency of 97 %. Both metasurfaces, designed for vortex beam emission, exhibit annular intensity converging capabilities at distinct wavelengths in the visible. Notably, the geometric metasurface shows achromatic annular intensity distributions over a continuous wavelength range up to 100 nm, in sharp contrast to the propagation metasurface, which is subject to inherent wavelength dispersion limitations. |
| first_indexed | 2024-03-08T00:10:00Z |
| format | Article |
| id | doaj.art-4ae791fa0e4c4bf98b3897b9ad50ceae |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-03-08T00:10:00Z |
| publishDate | 2024-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-4ae791fa0e4c4bf98b3897b9ad50ceae2024-02-17T06:41:07ZengElsevierHeliyon2405-84402024-02-01103e25436Gallium nitride-based geometric and propagation metasurfaces for vortex beam emissionsMeng-Hsin Chen0Yan-Liang Liu1Vin-Cent Su2Corresponding author.; Department of Electrical Engineering, National United University, Miaoli 36003, TaiwanDepartment of Electrical Engineering, National United University, Miaoli 36003, TaiwanCorresponding author.; Department of Electrical Engineering, National United University, Miaoli 36003, TaiwanThis work experimentally demonstrates the highly-efficient geometric and propagation metasurfaces for vortex beam emissions. These metasurfaces are respectively composed of high-aspect-ratio fin-like and cylindrical gallium nitride (GaN) meta-atoms. Remarkably, the optimized configuration of the fin-like GaN meta-atoms achieves a cross-polarization transmission efficiency of up to 99 %. Similarly, the cylindrical GaN meta-atoms exhibit an average co-polarization transmission efficiency of 97 %. Both metasurfaces, designed for vortex beam emission, exhibit annular intensity converging capabilities at distinct wavelengths in the visible. Notably, the geometric metasurface shows achromatic annular intensity distributions over a continuous wavelength range up to 100 nm, in sharp contrast to the propagation metasurface, which is subject to inherent wavelength dispersion limitations.http://www.sciencedirect.com/science/article/pii/S2405844024014671 |
| spellingShingle | Meng-Hsin Chen Yan-Liang Liu Vin-Cent Su Gallium nitride-based geometric and propagation metasurfaces for vortex beam emissions Heliyon |
| title | Gallium nitride-based geometric and propagation metasurfaces for vortex beam emissions |
| title_full | Gallium nitride-based geometric and propagation metasurfaces for vortex beam emissions |
| title_fullStr | Gallium nitride-based geometric and propagation metasurfaces for vortex beam emissions |
| title_full_unstemmed | Gallium nitride-based geometric and propagation metasurfaces for vortex beam emissions |
| title_short | Gallium nitride-based geometric and propagation metasurfaces for vortex beam emissions |
| title_sort | gallium nitride based geometric and propagation metasurfaces for vortex beam emissions |
| url | http://www.sciencedirect.com/science/article/pii/S2405844024014671 |
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