Terahertz metamaterials with VO2 cut-wires for thermal tunability

Qi-Ye Wen; Huai-Wu Zhang; Qing-Hui Yang; Yun-Song Xie; Kang Chen; Ying-Li Liu
July 2010
Applied Physics Letters;7/12/2010, Vol. 97 Issue 2, p021111
Academic Journal
An active terahertz (THz) metamaterial with vanadium dioxide (VO2) cut-wire resonators fabricated on glass substrate was proposed, and THz time-domain spectroscopy was used to probe the temperature-tuned electromagnetic properties. By thermal-triggering the insulator-metal phase transition of VO2, THz transmission signals through the metamaterial exhibit a significant decline with amplitude over 65%. Numerical simulations confirm the observations are due to the metallization of the VO2 film with increasing temperature.


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