手性(物理)
各向异性
材料科学
极化(电化学)
红外线的
范德瓦尔斯力
光电子学
凝聚态物理
光学
纳米技术
物理
对称性破坏
化学
分子
手征对称破缺
物理化学
量子力学
Nambu–Jona Lasinio模型
作者
Suyun Wang,De‐Kang Li,M. Zha,Xiao‐Qing Yan,Zhibo Liu,Jianguo Tian
出处
期刊:ACS Nano
[American Chemical Society]
日期:2023-08-02
卷期号:17 (16): 16230-16238
被引量:6
标识
DOI:10.1021/acsnano.3c06031
摘要
Twisted van der Waals structures exhibit a variety of unusual electrical and optical phenomena and could provide a powerful means for designing nanodevices with tunable chiral properties. However, programming intrinsic chiral properties of the film on the atomic scale remains a great challenge due to the limitations of fabrication and measurement techniques. Here, we report a highly tunable large optical activity of twisted anisotropic two-dimensional (2D) materials, including black phosphorus (BP), ReS2, PdSe2, and α-MoO3, by varying the twist angle between the stacked layers. The chirality can be deliberately tailored through the engineering of the symmetry, band structure, and anisotropy of 2D materials, demonstrating the high tunability of the chirality. The results show the highest thickness-normalized ellipticity value (13.8 deg μm-1, twisted ReS2) and ellipticity value (1581 mdeg, twisted BP) among the systems based on 2D materials. It is also shown that the chiroptical response exists in an extremely large spectral range from the visible to the infrared. Furthermore, the twisted ReS2 enabled spin-selective control of the information transformation. These results show that highly controllable chirality in twisted 2D anisotropic materials has considerable potential in on-chip polarization optics, nano-optoelectronics, and biology.
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