Silicon Photonic Beam Steerer Based on Metalens Focal Plane Array
Abstract
Focal plane arrays (FPAs) promise robust solid-state beam steering for LiDAR and free-space optical communications. However, the need for external collimation lenses hinders chip-scale compactness. Discrete switching between FPA elements further introduces blind spots and limits the number of resolvable points, restricting applications that require continuous tracking. Here, we demonstrate a silicon photonic beam steerer based on a metalens FPA that monolithically integrates the collimation lens on-chip. Thermo-optic prisms enable continuous fine-tuning, eliminating blind spots and tripling the number of resolvable points. Continuous steering over a 62{\deg} field of view is achieved while maintaining high beam quality, with an average sidelobe suppression ratio of 19 dB.
Keywords
Cite
@article{arxiv.2603.26654,
title = {Silicon Photonic Beam Steerer Based on Metalens Focal Plane Array},
author = {Chung-Yu Hsu and Ping-Yen Hsieh and Hsun-Sung Chiu and Li-Jun Tung and Chieh-Chih Yu and Ko-Chi Chen and Yu-Heng Hong and Hao-Chung Kuo and Chi-Wai Chow and You-Chia Chang},
journal= {arXiv preprint arXiv:2603.26654},
year = {2026}
}