Abstract-Thermally controlled terahertz metamaterial modulator based on phase transition of VO2 thin film

LIU Zhi-Qiang,CHANG Sheng-Jiang,WANG Xiao-Lei et al
http://wulixb.iphy.ac.cn/EN/abstract/abstract53353.shtml
Utilize insulator-metal phase transition of vanadium dioxide thin film, propose thermally controlled terahertz modulator based on metamaterial,research the transmission characteristics and temperature tunable characteristics of phase transition metamaterials in THz wave band.While the incident THz wave is horizontal polarization and vertical polarization,two independent pass bands are generated near 1THz. The center frequencies of the pass bands are 1.3THz and 1.7THz， the bandwidths are 0.2THz and 0.35THz. In addition, when temperature rises from 40 to 80 degree, the transmissions of two pass bands drop apparently, especially at phase transition temperature of 68 degree. For two polarization states, the modulation depths achieve 60% or more, which realize great function of a modulator