Polarization-insensitive ultraviolet super-oscillatory metalens doublet for large-field-of-view focusing and imaging

Tao Wang; Weijie Kong; Changtao Wang; Ling Liu; Mingbo Pu; Xiaoliang Ma; Xiong Li; Yun Long; Xiangang Luo

doi:10.1117/12.3023234

18 March 2024 Polarization-insensitive ultraviolet super-oscillatory metalens doublet for large-field-of-view focusing and imaging

Tao Wang, Weijie Kong, Changtao Wang, Ling Liu, Mingbo Pu, Xiaoliang Ma, Xiong Li, Yun Long, Xiangang Luo

Author Affiliations +

Proceedings Volume 13104, Advanced Fiber Laser Conference (AFL2023); 131042S (2024) https://doi.org/10.1117/12.3023234
Event: Advanced Fiber Laser Conference (AFL2023), 2023, Shenzhen, China

Abstract

In recent years, the super-oscillatory lens based on optical super-oscillatory phenomenon has been successfully applied to sub-diffraction focusing and imaging. However, most of the previously reported super-oscillatory lens only work in the visible and near-infrared wavelengths, and little research has been done in the ultraviolet. In this paper, a polarization-insensitive ultraviolet super-oscillatory metalens doublet is proposed. The simulation results show that sub-diffraction focusing and imaging with different incidence angles can be achieved at the ultraviolet operating wavelength of 365nm, and the full width at half maximum of the sub-diffraction foci is approximately 0.7 times of the diffraction limit. This metalens doublet has a numerical aperture of 0.4472, a focal length of 0.6896 mm, and a field of view of ±25°. The proposed polarization-insensitive ultraviolet super-oscillatory metalens doublet can be used in the fields of ultraviolet lithography and microscopic imaging.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Tao Wang, Weijie Kong, Changtao Wang, Ling Liu, Mingbo Pu, Xiaoliang Ma, Xiong Li, Yun Long, and Xiangang Luo "Polarization-insensitive ultraviolet super-oscillatory metalens doublet for large-field-of-view focusing and imaging", Proc. SPIE 13104, Advanced Fiber Laser Conference (AFL2023), 131042S (18 March 2024); https://doi.org/10.1117/12.3023234

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KEYWORDS

Ultraviolet radiation

Diffraction limit

Design

Super resolution

Phase distribution

Particle swarm optimization

UV optics

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