Optical-Transparent Self-Assembled MXene Film with High-Efficiency Terahertz Reflection Modulation
| Autor: | Hongfu Zhu, Sujit Das, Wanxia Huang, Xueguang Lu, Qiwu Shi, Tangdong Feng |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Terahertz radiation business.industry Impedance matching 02 engineering and technology Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Reflection (mathematics) Modulation Optoelectronics General Materials Science Self-assembly 0210 nano-technology Biological imaging business Electrical impedance |
| Zdroj: | ACS Applied Materials & Interfaces. 13:10574-10582 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.0c20787 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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