Terahertz Tunable Metasurface Lens Based on Vanadium Dioxide Phase Transition

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• 作者：Jingwen He ; Zhenwei Xie ; Wenfeng Sun ; Xinke Wang ; Yanda Ji ; Sen Wang…
• 关键词：Tunable metasurface lens ; Vanadium dioxide ; Terahertz
• 刊名：Plasmonics
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：11
• 期：5
• 页码：1285-1290
• 全文大小：1,908 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Biotechnology
  Nanotechnology
  Biophysics and Biomedical Physics
  Biochemistry
  
• 出版者：Springer US
• ISSN：1557-1963
• 卷排序：11

文摘

Based on the insulator-to-metal phase transition of vanadium dioxide (VO ₂), a terahertz (THz) tunable metasurface lens (TML), which consists of a THz metasurface lens and a VO ₂ film on Al ₂O₃ substrate, is proposed and experimentally verified. The focal intensity of the TML can be thermally controlled. The changes of the cross-polarized amplitude spectrum and the focal intensity during the heating and cooling processes are also investigated in detail. Any desired focal intensity can be obtained by adjusting the TML temperature. This TML and its approach will be of great significance for the development of the THz active devices.