纳米线
拉曼光谱
材料科学
X射线光电子能谱
光电子学
光子学
拓扑绝缘体
极化(电化学)
各向异性
衍射
纳米技术
光学
化学
化学工程
凝聚态物理
物理
物理化学
工程类
作者
Huaxin Yi,Churong Ma,Yuhang Ma,Shuhua Xu,Meilin Tao,Xinyi Guan,Wan Wang,Huanrong Liang,Zhaoqiang Zheng,Yichao Zou,Jiandong Yao,Guowei Yang
摘要
Herein, a facile, catalyst-free, and dry topochemical transformation strategy for transforming the Bi2S3 nanowires to the Bi2Se3 nanowires, which has been realized through an atmospheric pressure high-temperature selenization treatment, has been developed. The complete topochemical transformation has been verified by combining x-ray diffraction, Raman spectroscopy, energy dispersive spectrometer, x-ray photoelectron spectroscopy, transmission electron microscopy, and selected area electron diffraction measurements. Systematical optical characterizations, including polarization-resolved optical microscopy images and polarization-dependent Raman spectra, have revealed the strong anisotropy of the Bi2Se3 nanowires. Furthermore, finite-different time-domain simulations have consolidated that the Bi2Se3 nanowires possess highly anisotropic absorption cross sections across the ultraviolet to far infrared spectral range, laying a solid foundation for the realization of ultra-broadband polarized optoelectronic applications. On the whole, this pioneering study depicts a unique avenue for topological material design accompanied with the integration of additional functionalities beyond the intrinsic counterparts, opening up an attractive research field for polarized photonics and optoelectronics.
科研通智能强力驱动
Strongly Powered by AbleSci AI