Abstract

We demonstrate a high-efficiency on-chip one-dimensional metalens for three-dimensional (3D) light focusing. The metalens consists of a one-dimensional dielectric nano-antenna array, which scatters the evanescent wave of a nano-waveguide into free space and focuses this scattered light into a 3D ring. The corresponding phase profile of the metalens is controlled by the relative locations of antennas in the array. Through antenna-waveguide distance optimization, the designed metalens only scatters 1.5% of propagation light into free space and 55% of the scattered energy is focused into the 3D ring. When we use the antennas with an optimized shape, 50.18% of the focused energy is concentrated in a circular arc of the ring, which subtends an angle of 48°. This high-efficiency on-chip one-dimensional metalens is promising for non-invasive optical signal detection in photonic integrated chips.

© 2022 Optica Publishing Group

Realizing transmissive and reflective focusing with an on-chip metalens

Xiang Xiong, Siwen Wei, Wenjie Tang, Ruwen Peng, and Mu Wang
Opt. Lett. 47(15) 3696-3699 (2022)

High focusing efficiency metalens with large numerical aperture at terahertz frequency

Mengyu Yang, Xin Shen, Ziping Li, Zhongquan Wen, Gang Chen, Zhihai Zhang, Gaofeng Liang, Hua Li, and Zhengguo Shang
Opt. Lett. 48(17) 4677-4680 (2023)

Flat optical phased array receiver incorporating an on-chip metalens concentrator

Chul-Soon Im, Woo-Bin Lee, Ji-Yeong Gwon, and Sang-Shin Lee
Opt. Lett. 47(8) 2060-2063 (2022)

On-chip metalenses based on one-dimensional gradient trench in the broadband visible

Rui Yang, Yangyang Shi, Chenjie Dai, Chengwei Wan, Shuai Wan, and Zhongyang Li
Opt. Lett. 45(20) 5640-5643 (2020)

Frequency-modulated continuous-wave 3D imaging with high photon efficiency

Xin Huang, Yu Hong, Zheng-Ping Li, and Feihu Xu
Opt. Lett. 47(14) 3568-3571 (2022)