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Strain Tuning of the Anisotropy in the Optoelectronic Properties of TiS3
ACS Photonics ( IF 6.5 ) Pub Date : 2018-06-06 00:00:00 , DOI: 10.1021/acsphotonics.8b00467 J. A. Silva-Guillén 1, 2 , E. Canadell 3 , F. Guinea 2, 4 , R. Roldán 5
ACS Photonics ( IF 6.5 ) Pub Date : 2018-06-06 00:00:00 , DOI: 10.1021/acsphotonics.8b00467 J. A. Silva-Guillén 1, 2 , E. Canadell 3 , F. Guinea 2, 4 , R. Roldán 5
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The benefits of two-dimensional (2D) materials for applications in nanotechnology can be widened by exploiting the intrinsic anisotropy of some of those crystals, being black phosphorus the most well-known example. In this work we demonstrate that the anisotropy of TiS3, which is even stronger than that of black phosphorus, can be tuned by means of strain engineering. Using density functional theory calculations, we find that the ellipticity of the valence band can be inverted under moderate compressive strain, which is accompanied by an enhancement of the optical absorption. It is shown that the strain tuning of the band anisotropy can be exploited to focus plasmons in the desired direction, a feature that could be used to design TiS3 nanostructures with switchable plasmon channeling.
中文翻译：
TiS 3光电性能中各向异性的应变调谐
二维（2D）材料在纳米技术中的优势可以通过利用某些晶体的固有各向异性来扩大，其中最著名的例子是黑磷。在这项工作中，我们证明可以通过应变工程来调节甚至比黑磷强的TiS 3的各向异性。使用密度泛函理论计算，我们发现价带的椭圆率在中等压缩应变下可以反转，这伴随着光吸收的增强。结果表明，可以利用带各向异性的应变调谐将等离激元聚焦在所需方向上，该特征可用于设计TiS 3 具有可转换的等离激元通道的纳米结构。
更新日期：2018-06-06
中文翻译：
TiS 3光电性能中各向异性的应变调谐
二维（2D）材料在纳米技术中的优势可以通过利用某些晶体的固有各向异性来扩大，其中最著名的例子是黑磷。在这项工作中，我们证明可以通过应变工程来调节甚至比黑磷强的TiS 3的各向异性。使用密度泛函理论计算，我们发现价带的椭圆率在中等压缩应变下可以反转，这伴随着光吸收的增强。结果表明，可以利用带各向异性的应变调谐将等离激元聚焦在所需方向上，该特征可用于设计TiS 3 具有可转换的等离激元通道的纳米结构。
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