Progress in Water-Based Metamaterial Absorber: A Review

TL;DR

This review discusses recent advances in water-based metamaterial absorbers for microwave applications, highlighting their simplicity, versatility, and potential for ultra-broadband, tunable, and multi-functional absorption.

Contribution

It provides a comprehensive overview of water-based metamaterial absorbers, emphasizing their mechanisms, advantages, and future development directions.

Findings

Water-based metamaterials enable simpler absorber designs.

They achieve polarization- and angle-insensitive ultra-broadband absorption.

Potential for tunable and multi-functional microwave absorption applications.

Abstract

Increasing attention on microwave ultra-broadband metamaterial absorbers has been paid due to their promising applications. While most microwave ultra-broadband metamaterial absorbers developed so far are based on metallic resonant structures, dispersive dielectric water-based metamaterial opens a simpler and more versatile route for the construction of polarization- and angle- insensitive ultra-broadband absorption. Here, we review the recent progresses of water-based metamaterial absorber by providing an illustration of the mechanisms to realize ultra-broadband, tunable and multi-functional absorption. We also address the further development direction and some potential novel applications.