Terahertz Polarizers Based on 2D Ti 3 C 2 T z MXene: Spin Cast from Aqueous Suspensions
Terahertz Polarizers Based on 2D Ti 3 C 2 T z MXene: Spin Cast from Aqueous Suspensions
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DOI：
10.1002/adpr.202000084
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发表时间：
2020-11
期刊：
影响因子：
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通讯作者：
Guangjiang Li;Kiana Montazeri;M. K. Ismail;M. Barsoum;B. Nabet;L. Titova
中科院分区：
文献类型：
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作者：
Guangjiang Li;Kiana Montazeri;M. K. Ismail;M. Barsoum;B. Nabet;L. Titova
本文报道了一种制造太赫兹（THz）偏振片的方法，方法是在光刻图像化的太赫兹（THz）透明衬底上简单地自旋浇铸二维（2D） MXene ti3c2tznano片，然后浸泡在丙酮中。30nm‐厚，10-20 μm宽的线导致电场(E)消光比（ER）高达3db，或功率ER高达6db。仿真结果表明，通过将MXene线厚度增加到1.5-2 μm并优化超表面图案，可以实现16 dB以上的ER，或功率ER高于32 dB。ti3c2tznano片是溶液处理的，可以沉积在各种衬底上，包括柔性衬底。一旦封装，化学稳定的太赫兹偏振器，结合高性能和低生产成本，可以很容易地制造，其特性与更复杂的金属线栅偏振器相比，包括金和钨。此外，最近通过超快光脉冲证明Ti3C2TzTHz电导率的动态可调性，这为在高速THz调制器中使用MXene线栅提供了可能性。
Herein, the fabrication of terahertz (THz) polarizers is reported on by simply spin casting two‐dimensional (2D) MXene Ti3C2Tznanosheets on a photolithographically patterned THz‐transparent substrate and subsequent immersion in acetone. Lines 30 nm‐thick and 10–20 μm wide result in electric field (E) extinction ratios (ER) of up to 3 dB, or power ER of up to 6 dB. Simulations show the possibility of achieving ER beyond 16 dB, or power ER higher than 32 dB by increasing the thickness of the MXene lines to 1.5–2 μm and optimizing the metasurface patterns. The Ti3C2Tznanosheets are solution‐processed and can be deposited on a variety of substrates, including flexible ones. Once encapsulated, chemically stable THz polarizers, that combine high performance and low production costs, can be readily manufactured, with characteristics that compare favorably with the much more involved metallic wire grid polarizers, including gold and tungsten. Moreover, recent demonstration of dynamic tunability of Ti3C2TzTHz conductivity by ultrafast optical pulses opens the possibility of using MXene wire‐grids in high‐speed THz modulators.