Abstract

A conventional metalens is designed with a fixed working environment, and its focal length depends on the background refractive index. In this study, we propose a dual-environment metalens that can maintain the same focal length in both media of air and water. The metalens consists of 16 types of meta-atoms with different geometries, which can cover the ${0}-{2}\pi$ phase range in both air and water. We perform finite-difference time-domain simulations to investigate the metalens and demonstrate that its focal length remains unchanged, regardless of whether the background medium is air or water. Furthermore, we investigated the optical forces within the focal field of the metalens in both air and water, indicating its potential trapping capability in these media. Our method provides a new insight into dual-environment metasurfaces and advances the methodology of electromagnetic structures in extensive applications.

© 2024 Optica Publishing Group

All-silicon metalens for broadband achromatic polarization multiplexing in long-wave infrared wavelengths

Yilin Lu, Ruohui Chen, Chao Hu, Xiaofei Liu, Zhikai Gan, Xingyan Zhao, Yang Qiu, Shaonan Zheng, Qize Zhong, Yuan Dong, Chun Lin, and Ting Hu
Appl. Opt. 63(12) 3242-3249 (2024)

Design and simulation of an extreme ultraviolet metalens based on the Pancharatnam–Berry phase

Xu Mao, Gang Yu, Yongmei Zhao, Bo Wei, Zhaofeng Li, Fuhua Yang, and Xiaodong Wang
Appl. Opt. 63(7) 1867-1874 (2024)

Dual-layer achromatic metalens design with an effective Abbe number

Mengmeng Li, Shuaishuai Li, Lip Ket Chin, Yefeng Yu, Din Ping Tsai, and Rushan Chen
Opt. Express 28(18) 26041-26055 (2020)

Multifunctional metalens optical tweezers for optical information recognition

Yuehua Deng, Xiaoyan Huang, Zhechun Lu, Dongying Wang, Shaoqi Li, Shengru Zhou, Zhaojian Zhang, Jianfa Zhang, Yang Yu, and Junbo Yang
Opt. Express 32(6) 9456-9467 (2024)

All-dielectric high-NA achromatic metalenses in the mid-infrared band based on subregions

Zhiheng Wang, Weiguo Liu, Yechuan Zhu, and Shun Zhou
Appl. Opt. 63(9) 2241-2247 (2024)