Discovering the forbidden Raman modes at the edges of layered materials
Discovering the forbidden Raman modes at the edges of layered materials
复制标题
发现层状材料边缘的禁止拉曼模式
DOI：
10.1126/sciadv.aau6252
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发表时间：
2018-12-01
期刊：
影响因子：
13.6
通讯作者：
Chai, Yang
中科院分区：
文献类型：
--
作者：
Guo, Yao;Zhang, Weixuan;Chai, Yang
Forbidden Raman modes of layered materials (MoS2, WS2, WSe2, and black phosphorus) are detected from the edge regions. The edges of layered materials have unique properties that substantially differ from the body regions. In this work, we perform a systematic Raman study of the edges of various layered materials (MoS2, WS2, WSe2, PtS2, and black phosphorus). The Raman spectra of the edges feature newly observed forbidden Raman modes, which are originally undetectable from the body region. By selecting the edge type and the polarization directions of the incident and scattered light, all forbidden Raman modes are distinctly detected. Optical simulations show that the edges of layered materials drastically distort the electromagnetic fields of both the incident and scattered light, so that the light interacts with the edges in a distinct way, which differs from its interactions with the body regions.
