Floating Multi-Focus Metalens for High-Efficiency Airborne Laser Wireless Charging
Laser wireless power transfer (LWPT) offers a transformative approach to wireless energy transmission, addressing critical limitations in unmanned aerial vehicles (UAVs) such as battery energy limitation. However, challenges like beam divergence, non-uniform irradiation, and alignment instability li...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-02-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/12/2/150 |
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| author | Zheting Meng Yuting Xiao Lianwei Chen Si Wang Yao Fang Jiangning Zhou Yang Li Dapeng Zhang Mingbo Pu Xiangang Luo |
| author_facet | Zheting Meng Yuting Xiao Lianwei Chen Si Wang Yao Fang Jiangning Zhou Yang Li Dapeng Zhang Mingbo Pu Xiangang Luo |
| author_sort | Zheting Meng |
| collection | DOAJ |
| description | Laser wireless power transfer (LWPT) offers a transformative approach to wireless energy transmission, addressing critical limitations in unmanned aerial vehicles (UAVs) such as battery energy limitation. However, challenges like beam divergence, non-uniform irradiation, and alignment instability limit its practical application. Here, we present a lightweight air-floating metalens platform to overcome these barriers. This innovative lens focuses laser beams near the photovoltaic receiver with an energy distribution uniformity across a single spot at the focal plane that is 50 times greater than that of a conventional Gaussian beam spot, achieving a multi-spot energy distribution uniformity of up to 99% theoretically. Experimentally, we achieved 75% uniformity using a metalens sample. Simultaneously, our system maintains superior beam quality within a dynamic range of 4 m and enhances charging efficiency by 1.5 times. Our research provides a robust technical solution to improve UAV endurance, enabling efficient, long-range wireless power transfer and opening broader technological implications. |
| format | Article |
| id | doaj-art-65e7b28bd4014ad4a8e83777fef69871 |
| institution | DOAJ |
| issn | 2304-6732 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj-art-65e7b28bd4014ad4a8e83777fef698712025-08-20T03:12:09ZengMDPI AGPhotonics2304-67322025-02-0112215010.3390/photonics12020150Floating Multi-Focus Metalens for High-Efficiency Airborne Laser Wireless ChargingZheting Meng0Yuting Xiao1Lianwei Chen2Si Wang3Yao Fang4Jiangning Zhou5Yang Li6Dapeng Zhang7Mingbo Pu8Xiangang Luo9National Key Laboratory of Optical Field Manipulation Science and Technology, Chinese Academy of Sciences, Chengdu 610209, ChinaNational Key Laboratory of Optical Field Manipulation Science and Technology, Chinese Academy of Sciences, Chengdu 610209, ChinaNational Key Laboratory of Optical Field Manipulation Science and Technology, Chinese Academy of Sciences, Chengdu 610209, ChinaNational Key Laboratory of Optical Field Manipulation Science and Technology, Chinese Academy of Sciences, Chengdu 610209, ChinaNational Key Laboratory of Optical Field Manipulation Science and Technology, Chinese Academy of Sciences, Chengdu 610209, ChinaNational Key Laboratory of Optical Field Manipulation Science and Technology, Chinese Academy of Sciences, Chengdu 610209, ChinaNational Key Laboratory of Optical Field Manipulation Science and Technology, Chinese Academy of Sciences, Chengdu 610209, ChinaNational Key Laboratory of Optical Field Manipulation Science and Technology, Chinese Academy of Sciences, Chengdu 610209, ChinaNational Key Laboratory of Optical Field Manipulation Science and Technology, Chinese Academy of Sciences, Chengdu 610209, ChinaNational Key Laboratory of Optical Field Manipulation Science and Technology, Chinese Academy of Sciences, Chengdu 610209, ChinaLaser wireless power transfer (LWPT) offers a transformative approach to wireless energy transmission, addressing critical limitations in unmanned aerial vehicles (UAVs) such as battery energy limitation. However, challenges like beam divergence, non-uniform irradiation, and alignment instability limit its practical application. Here, we present a lightweight air-floating metalens platform to overcome these barriers. This innovative lens focuses laser beams near the photovoltaic receiver with an energy distribution uniformity across a single spot at the focal plane that is 50 times greater than that of a conventional Gaussian beam spot, achieving a multi-spot energy distribution uniformity of up to 99% theoretically. Experimentally, we achieved 75% uniformity using a metalens sample. Simultaneously, our system maintains superior beam quality within a dynamic range of 4 m and enhances charging efficiency by 1.5 times. Our research provides a robust technical solution to improve UAV endurance, enabling efficient, long-range wireless power transfer and opening broader technological implications.https://www.mdpi.com/2304-6732/12/2/150multi-foci metalenshigh-efficiencylightweightairborne charging |
| spellingShingle | Zheting Meng Yuting Xiao Lianwei Chen Si Wang Yao Fang Jiangning Zhou Yang Li Dapeng Zhang Mingbo Pu Xiangang Luo Floating Multi-Focus Metalens for High-Efficiency Airborne Laser Wireless Charging Photonics multi-foci metalens high-efficiency lightweight airborne charging |
| title | Floating Multi-Focus Metalens for High-Efficiency Airborne Laser Wireless Charging |
| title_full | Floating Multi-Focus Metalens for High-Efficiency Airborne Laser Wireless Charging |
| title_fullStr | Floating Multi-Focus Metalens for High-Efficiency Airborne Laser Wireless Charging |
| title_full_unstemmed | Floating Multi-Focus Metalens for High-Efficiency Airborne Laser Wireless Charging |
| title_short | Floating Multi-Focus Metalens for High-Efficiency Airborne Laser Wireless Charging |
| title_sort | floating multi focus metalens for high efficiency airborne laser wireless charging |
| topic | multi-foci metalens high-efficiency lightweight airborne charging |
| url | https://www.mdpi.com/2304-6732/12/2/150 |
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