各向异性二维材料的拉曼散射及偏振光学研究
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- 英文论文题名：Raman Spectroscopic and Polarized Optical Studies of Anisotropic Two-dimensional(2D) Materials
- 论文作者：童廉明 ; 张锦
- 英文论文作者：Lianming Tong ; Jin Zhang ; Center for Nanochemistry ; College of Chemistry and Molecular Engineering ; Peking University
- 年：2016
- 作者机构：北京大学化学与分子工程学院纳米化学研究中心;
- 论文关键词：二维原子晶体 ; 各向异性 ; 拉曼散射 ; 光学衬度 ; 双折射
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十五分会：纳米表征与测量
- 语种：中文
- 分类号：TB303
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十五分会 ; 纳米表征与测量
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：111k
- 原文格式：D
- 会议级别：全国
摘要
二维原子材料的晶体结构对称性决定了材料的本征性质。低对称性的二维材料,包括单斜晶系的黑磷(Black Phosphorous,BP)和三斜晶系的二硫化铼(Rhenium Disulphide,ReS_2),具有显著的各向异性特性,其电学、力学、光学等性质都强烈依赖于晶轴取向。例如,黑磷沿着armchair方向的载流子迁移率远高于沿着zigzag方向,光吸收率也高于zigzag方向,其荧光和拉曼散射光谱都具有显著的偏振特性。这些各向异性特性不仅给二维材料的基本物理性质研究提供了一个新的维度和视角,并且启示了这类新型二维材料在电学和光学领域的全新应用。我们系统研究了以黑磷和二硫化铼为代表的各向异性二维材料的拉曼散射光谱和偏振光学,发展了快速判断晶格取向的角度分辨拉曼散射光谱法和偏振光学衬度法,发现了以黑磷和二硫化铼为基底的各向异性拉曼散射增强效应,研究了这类少层二维材料的光学双折射效应,并展示了其作为纳米级厚度光学元件方面的应用。
The crystalline structure of two-dimensional(2D) materials determines their intrinsic properties. 2D materials with low symmetry, including monoclinic black phosphorous(BP) and triclinic Rhenium Disulphide(ReS_2), exhibit distinct anisotropy. The electronic, mechanical and optical properties strongly depend on the crystalline orientation. For example, the carrier mobility of BP along the armchair direction is much higher than that along the zigzag direction, and the optical absorbance is also higher than that along zigzag. The fluorescence and Raman scattering are both sensitively polarization dependent. The anisotropy not only offers a new dimension in addition to the rich fundamental physical properties of 2D materials, but also implies novel optical and electronic applications. We show the systematic investigations of the Raman scattering and polarized optical properties of such anisotropic 2D materials represented by BP and ReS_2, including the development of rapid identification of crystalline orientation using angle-resolved Raman spectroscopy and polarized optical contrast means, the anisotropic Raman enhancement, the optical birefringence, and the application as light modulator with nanoscale thickness.
The crystalline structure of two-dimensional(2D) materials determines their intrinsic properties. 2D materials with low symmetry, including monoclinic black phosphorous(BP) and triclinic Rhenium Disulphide(ReS_2), exhibit distinct anisotropy. The electronic, mechanical and optical properties strongly depend on the crystalline orientation. For example, the carrier mobility of BP along the armchair direction is much higher than that along the zigzag direction, and the optical absorbance is also higher than that along zigzag. The fluorescence and Raman scattering are both sensitively polarization dependent. The anisotropy not only offers a new dimension in addition to the rich fundamental physical properties of 2D materials, but also implies novel optical and electronic applications. We show the systematic investigations of the Raman scattering and polarized optical properties of such anisotropic 2D materials represented by BP and ReS_2, including the development of rapid identification of crystalline orientation using angle-resolved Raman spectroscopy and polarized optical contrast means, the anisotropic Raman enhancement, the optical birefringence, and the application as light modulator with nanoscale thickness.
引文
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[4]Mao,N.;Wu,J.;Han,B.;Lin,J.;Tong,L.;Zhang,J.;Small,2016,10.1002/smll.201600295
[2]Lin,J.;Liang,L.;Ling,X.;Zhang,S.;Mao,N.;Zhang,N.;Sumpter,B.;Meunier,V.;Tong,L.;Zhang,J.;J.Am.Chem.Soc.,2015,137:15511.
[3]Mao,N.;Tang,J.;Xie,L.;Wu,J.;Han,B.;Lin,J.;Deng,S.;Ji,W.;Xu,H.;Liu,K.;Tong,L.;Zhang,J.;J.Am.Chem.Soc.,2016,138:300.
[4]Mao,N.;Wu,J.;Han,B.;Lin,J.;Tong,L.;Zhang,J.;Small,2016,10.1002/smll.201600295