Work

On-chip spatial multiplexing metasurface for multi-channel optical field modulation

Year: 2025

Type: article

Abstract: On-chip integrated metasurfaces driven by waveguides have excellent capabilities in optical field manipulation, enabling great significance in fields such as holographic display and optical communication. However, realizing the simultaneous modulation of both spatial and waveguide beams with a single metasurface remains challenging. Here, we proposed a metasurface modulation method based on the theories of the detour phase and Pancharatnam−Berry phase, which achieves simultaneous manipulation of waveguide radiation, polarization state, and dynamic wavefront from five incident optical channels. Moreover, to fully tap into the design potential of metasurfaces and avoid complex physical model inference, an end-to-end design framework was proposed to achieve joint optimization of design parameters and target light fields. As a prototype, we demonstrated three types of multi-channel silicon metasurfaces on Si 3 N 4 waveguides, which realize the functions of holographic display, multi-focusing, and multi-channel vortex beam generation. The on-chip spatial multiplexing metasurface has the advantage of high integration and easy implementation, which has the potential to promote the development of multifunctional integrated optical systems.

Source: Optics Express

DOI: 10.1364/oe.565440

Authors: Yongqi Liu, Yi Lian, Pengfei Qi, Cheng Chi, Dewen Cheng, Yongtian Wang

Institution: Nankai University

Language: English

Topic: Metamaterials and Metasurfaces Applications

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funders: National Natural Science Foundation of China, Beijing Institute of Technology Research Fund Program for Young Scholars