Multi-channel transmission meta-holograms enabled by a single-layer complex-amplitude metasurface

Area of Science:

• Electromagnetics
• Materials Science
• Wireless Communications

Background:

• Traditional wireless communication struggles with high-quality multi-channel transmissions due to increasing demand.
• Complex-amplitude metasurfaces offer a promising approach by jointly controlling electromagnetic wave amplitude and phase.
• Existing single-layer metasurfaces face limitations in transmission efficiency and amplitude-phase coupling, hindering multi-channel performance and integration.

Purpose of the Study:

• To propose a single-layer complex-amplitude metasurface design strategy for achieving high-quality multi-channel wireless transmission.
• To overcome the limitations of amplitude-phase coupling and enhance transmission efficiency in metasurface-based systems.
• To demonstrate a practical solution for advanced information transmission in wireless communication systems.

Main Methods:

• A single-layer complex-amplitude metasurface design strategy was developed.
• Resonator structural parameters and rotation angles were adjusted to concurrently control amplitude and phase for each transmission channel.
• The metasurface was designed to reconstruct distinct holograms across multiple transmission channels.

Main Results:

• The proposed metasurface successfully achieved concurrent control over amplitude and phase for individual transmission channels.
• The metasurface demonstrated the ability to reconstruct different holograms across five distinct transmission channels.
• Experimental results showed strong agreement with calculated and simulated data, validating the design's effectiveness.

Conclusions:

• A novel single-layer complex-amplitude metasurface design strategy enables high-quality multi-channel information transmission.
• The design effectively addresses amplitude-phase coupling issues and enhances transmission capabilities.
• This innovative solution holds significant potential for future advancements in wireless communication technologies.