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Raman spectroscopy regulation in van der Waals crystals

文献类型：期刊论文

作者Zheng, Wei2; Zhu, Yanming2; Li, Fadi1; Huang, Feng2
刊名PHOTONICS RESEARCH
出版日期2018-11-01
卷号6期号:11页码:991-995
ISSN号2327-9125
DOI10.1364/PRJ.6.000991
通讯作者Huang, Feng(huangfeng@mail.sysu.edu.cn)
英文摘要Raman spectroscopy is a versatile tool widely used for comprehensive probing of crystal information. However, generally when applied in narrow-band-gap van der Waals crystals, it is liable to form a "bug," especially in transition-metal-dichalcogenides (TMDs). That is, several resonant Raman-scattering (RS) modes will inevitably appear in the Raman spectra with strong intensity, interfering with the desired signal of optical-phonon modes. Here, we propose cross-sectional polarized Raman scattering capable of regulating the intensity of RS modes in accordance with quasi-sinusoidal rules. Typically, for MoS2 and WS2, when the polarization vector of excited light is along the c axis of the crystal, all RS modes are nearly completely "expunged" from the Raman spectra. The mechanism is that the absorption of most TMDs with a space group of R-3m for the light polarized along the c axis is infinitesimal, thus forming a small coupling intensity of electronic states excited optically and acoustic-phonon modes at point M, which in turn restrain the appearance of RS modes. The regulating strategy proposed can be applied to other van der Waals crystals so as to obtain a high signal-to-noise ratio Raman spectrum. (C) 2018 Chinese Laser Press
WOS关键词TRANSITION-METAL DICHALCOGENIDES ; GRAPHENE ; HETEROSTRUCTURES ; TENSOR ; BULK ; SCATTERING ; MONOLAYER ; EVOLUTION ; PHONON
资助项目National Natural Science Foundation of China (NSFC)[61427901] ; National Natural Science Foundation of China (NSFC)[61604178] ; National Natural Science Foundation of China (NSFC)[91333207] ; National Natural Science Foundation of China (NSFC)[U1505252]
WOS研究方向Optics
语种英语
WOS记录号WOS:000448995300002
出版者OPTICAL SOC AMER
资助机构National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC)
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/40102]  
专题合肥物质科学研究院_中科院固体物理研究所
通讯作者Huang, Feng
作者单位1.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China
2.Sun Yat Sen Univ, Sch Mat, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China
推荐引用方式
GB/T 7714		 Zheng, Wei,Zhu, Yanming,Li, Fadi,et al. Raman spectroscopy regulation in van der Waals crystals[J]. PHOTONICS RESEARCH,2018,6(11):991-995.
APA Zheng, Wei,Zhu, Yanming,Li, Fadi,&Huang, Feng.(2018).Raman spectroscopy regulation in van der Waals crystals.PHOTONICS RESEARCH,6(11),991-995.
MLA Zheng, Wei,et al."Raman spectroscopy regulation in van der Waals crystals".PHOTONICS RESEARCH 6.11(2018):991-995.

入库方式： OAI收割

来源：合肥物质科学研究院

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