Volume 532, Issue 1 1900396
Original Paper

Tunable Optical Hooks in the Visible Band Based on Ultra-Thin Metalenses

Xiaoliang Ma

Xiaoliang Ma

State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, 610209 China

School of Optoelectronics, University of Chinese Academy of Sciences, Beijing, 100049 China

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Yinghui Guo

Yinghui Guo

State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, 610209 China

School of Optoelectronics, University of Chinese Academy of Sciences, Beijing, 100049 China

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Mingbo Pu

Mingbo Pu

State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, 610209 China

School of Optoelectronics, University of Chinese Academy of Sciences, Beijing, 100049 China

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JinJin Jin

JinJin Jin

State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, 610209 China

School of Optoelectronics, University of Chinese Academy of Sciences, Beijing, 100049 China

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Ping Gao

Ping Gao

State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, 610209 China

School of Optoelectronics, University of Chinese Academy of Sciences, Beijing, 100049 China

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Xiong Li

Xiong Li

State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, 610209 China

School of Optoelectronics, University of Chinese Academy of Sciences, Beijing, 100049 China

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Xiangang Luo

Corresponding Author

Xiangang Luo

State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, 610209 China

School of Optoelectronics, University of Chinese Academy of Sciences, Beijing, 100049 China

E-mail: [email protected]Search for more papers by this author
First published: 01 December 2019
Citations: 7

Abstract

Optical hook, a kind of curved high-intensity light beam, has aroused tremendous interests during the past several years, and its experimental observation has been reported in the terahertz band. The existing approaches to generate such beams depend on the effect of “curved photonic nanojet” stemming from transparent and symmetry breaking high-index dielectric slab, and thus are restricted by the limited material selection, large device footprint, and fixed trajectory. Herein, the generation of photonic hooks in the visible band based on ultra-thin metalenses is reported. The strategy can overcome the limitations mentioned above and the photonic hook can be easily tuned by changing the incidence angle or wavelength. Such flexibility is likely to widen the future applications of such unique beam in particle trapping, optical tweezers, and superresolution imaging.

Conflict of Interest

The authors declare no conflict of interest.

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