Optical-Transparent Self-Assembled MXene Film with High-Efficiency Terahertz Reflection Modulation
Optical-Transparent Self-Assembled MXene Film with High-Efficiency Terahertz Reflection Modulation
复制标题
具有高效太赫兹反射调制的光学透明自组装MXene薄膜
DOI：
10.1021/acsami.0c20787
复制
发表时间：
2021-02-19
影响因子：
9.5
通讯作者：
Shi, Qiwu
中科院分区：
文献类型：
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作者：
Feng, Tangdong;Huang, Wanxia;Shi, Qiwu
太赫兹（THz）波的调制是其在下一代通信、生物成像、传感等方面应用的基础。尽管人们已经探索出了许多调谐太赫兹波的材料，但对更高效率的调制的探索仍在进行中。在这项工作中，光学透明的自组装MXene薄膜被用来调制太赫兹反射在SiO2/MXene/空气界面的阻抗匹配机制的基础上。通过调整堆叠的MXene层的数量/MXene分散体的浓度，MXene膜的薄层电导率将改变，使得可以调谐SiO2/MXene/空气界面处的阻抗，并导致THz反射的巨大调制。特别是，我们证明了MXene薄膜具有高效的THz调制，从反射增强到反射增强，相对反射率分别为27%和406%。该工作为开发兼具光学透明性和高灵敏THz反射特性的MXene薄膜提供了一条新的途径，该薄膜可用于THz散射或反射增强。
The modulation of the terahertz (THz) wave is fundamental for its applications in next-generation communications, biological imaging, sensing, and so forth. Searching for higher efficient modulation is still in progress, although plenty of materials have been explored for tuning THz wave. In this work, optical-transparent self-assembled MXene films are used to modulate the THz reflection at the SiO2/MXene/air interface based on the impedance matching mechanism. By adjusting the number of stacked MXene layers/concentrations of MXene dispersions, the sheet conductivity of the MXene films will be changed so that the impedance at the SiO2/MXene/air interface can be tuned and lead to a giant modulation of THz reflection. Particularly, we demonstrate that the MXene films have highly efficient THz modulation from antireflection to reflection-enhancing with a relative reflection of 27% and 406%, respectively. This work provides a new pathway for developing the MXene films with the combination of optical-transparency and high smart THz reflection characteristics, and the films can be applied for THz antireflection or reflection-enhancing.