Terahertz Tunable Metasurface Lens Based on Vanadium Dioxide Phase Transition
Terahertz Tunable Metasurface Lens Based on Vanadium Dioxide Phase Transition
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基于二氧化钒相变的太赫兹可调谐超表面透镜
DOI：
10.1007/s11468-015-0173-2
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发表时间：
2016-10-01
期刊：
影响因子：
3
通讯作者：
Zhang, Yan
中科院分区：
文献类型：
--
作者：
He, Jingwen;Xie, Zhenwei;Zhang, Yan
基于二氧化钒（VO 2）的绝缘体-金属相变特性，提出并实验验证了一种由太赫兹（THz）超颖表面透镜和Al 2 O3衬底上的VO 2薄膜组成的THz可调谐超颖表面透镜（TML）. TML的焦点强度可以被热控制。详细研究了加热和冷却过程中交叉偏振振幅谱和焦斑强度的变化。通过调节TML温度可以获得任何所需的焦点强度。这种TML及其方法对THz有源器件的发展具有重要意义。
Based on the insulator-to-metal phase transition of vanadium dioxide (VO2), a terahertz (THz) tunable metasurface lens (TML), which consists of a THz metasurface lens and a VO2film on Al2O3substrate, 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.