太赫兹辐射
材料科学
消光比
超材料
光电子学
极化(电化学)
超材料吸收剂
二氧化二钒
光学
双重功能
可调谐超材料
物理
薄膜
纳米技术
化学
工程制图
物理化学
轮廓
工程类
波长
作者
Mingjia Xing,Yunjie Teng
出处
期刊:Coatings
[MDPI AG]
日期:2023-04-09
卷期号:13 (4): 753-753
被引量:4
标识
DOI:10.3390/coatings13040753
摘要
On the basis of the temperature-controlled phase change properties of vanadium dioxide (VO2), a dual-functional terahertz metamaterial device is proposed. The device can be switched between an absorber and a polarization converter. Simulation results demonstrate that the device acts as a terahertz wave absorber when the VO2 is in the metallic state, and the reflected extinction ratio is less than −15 dB in the frequency range between 1.07 and 1.19 THz. Moreover, the absorption performance is insensitive to polarization. When the VO2 is in the insulated state, the device behaves as a polarization converter, which can convert line-polarized light to cross-polarized light. The polarization conversion rate of the device is over 90% in the frequency range between 1.43 and 1.51 THz. The proposed dual-functional metamaterial device with tunable and diverse functions has broad and potentially useful uses in areas such as terahertz detection, modulation, and switching.
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