Tunable ultra-broadband plasmonic terahertz absorber based on ultrathin phase-change metamaterials

, the absorption characteristics are tunable, and the device is insensitive to both TE and TM polarizations. The designed absorber combines the advantages of ultrawideband, high performance, tunability, and miniaturization, making it suitable for enhancing terahertz communication technology, optimizing high-resolution imaging, and applications in high-precision sensing, providing strong support for the development of related technologies.