2012/05/25 by Qiye Wen, Qi-Ye Wen, Huaiwu Zhang +10 · 10 citations
Materials Science · Engineering · #Metamaterials and Metasurfaces Applications #Advanced Antenna and Metasurface Technologies #Antenna Design and Analysis
paper · doi:10.1088/0022-3727/45/23/235106
Abstract A tunable hybrid metamaterial absorber (MA) in the microwave band was designed, fabricated and characterized. The hybrid MA was realized by incorporating a VO 2 film into the conventional resonant MA. By thermally triggering the insulator–metal phase transition of the VO 2 film, the impedance match condition was broken and a deep amplitude modulation of about 63.3% to the electromagnetic wave absorption was achieved. A moderate blue-shift of the resonance frequency was observed which is promising for practical applications. This VO 2 -based MA exhibits many advantages such as strong tunability, frequency agility, simple fabrication and ease of scaling to the terahertz band.