Switchable broadband-to-narrowband terahertz metamaterial absorber based on phase-change material GST
Leveraging the non‐volatile phase‐change characteristics of Ge2Sb2Te5 (GST), we design and numerically verifies a terahertz metamaterial absorber that enables dual‐function switching between broadband and narrowband absorption in different terahertz frequency bands. The absorber consists of a top gold‐GST hybrid resona...