Plasmonic Effect on the Magneto-Optical Property of Monolayer WS2 Studied by Polarized-Raman Spectroscopy

Wuguo Liu; Zhongtao Lin; Shibing Tian; Yuan Huang; Huaqing Xue; Ke Zhu; Changzhi Gu; Yang Yang; Junjie Li

doi:10.3390/app11041599

Plasmonic Effect on the Magneto-Optical Property of Monolayer WS₂ Studied by Polarized-Raman Spectroscopy

Wuguo Liu, Zhongtao Lin, Shibing Tian, Yuan Huang, Huaqing Xue, Ke Zhu, Changzhi Gu, Yang Yang^*, Junjie Li^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

In recent years, the magneto-optical properties of two-dimensional transition metal disulfides have attracted more and more attention due to their further device applications in spintronics and valleytronics. However, to our knowledge, the plasmonic effect on the magneto-optical properties of WS₂ has not been studied. In this work, monolayer WS₂ transferred on SiO₂/Si substrate and Au film were investigated respectively using polarized-Raman spectroscopy at 4 K under different magnetic fields. Prominent magnetic field–induced variations in the Raman intensities of WS₂ samples were observed, which also exhibited significant differences in the spectral evolution versus magnetic field. The resonance magnetic field was 5 T and 5.5 T for the WS₂ on SiO₂/Si substrate and Au film, respectively. Remarkably, the magneto-optical Raman intensities of (Formula presented.) and 2LA(M) modes for WS₂ on Au film were reduced to approximately 60% compared with that of WS₂ on SiO₂/Si. These results suggest that the plasmonic effect–induced charge transfer plays an important role in the magneto-optical Raman effect of WS₂.

Original language	English
Article number	1599
Journal	Applied Sciences (Switzerland)
Volume	11
Issue number	4
DOIs	https://doi.org/10.3390/app11041599
Publication status	Published - Feb 2021
Externally published	Yes

Keywords

Raman
WS
magneto-optical effect
substrate

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10.3390/app11041599

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@article{1f4b592d1b654139928ba5d3544542c9,

title = "Plasmonic Effect on the Magneto-Optical Property of Monolayer WS2 Studied by Polarized-Raman Spectroscopy",

abstract = "In recent years, the magneto-optical properties of two-dimensional transition metal disulfides have attracted more and more attention due to their further device applications in spintronics and valleytronics. However, to our knowledge, the plasmonic effect on the magneto-optical properties of WS2 has not been studied. In this work, monolayer WS2 transferred on SiO2/Si substrate and Au film were investigated respectively using polarized-Raman spectroscopy at 4 K under different magnetic fields. Prominent magnetic field–induced variations in the Raman intensities of WS2 samples were observed, which also exhibited significant differences in the spectral evolution versus magnetic field. The resonance magnetic field was 5 T and 5.5 T for the WS2 on SiO2/Si substrate and Au film, respectively. Remarkably, the magneto-optical Raman intensities of (Formula presented.) and 2LA(M) modes for WS2 on Au film were reduced to approximately 60% compared with that of WS2 on SiO2/Si. These results suggest that the plasmonic effect–induced charge transfer plays an important role in the magneto-optical Raman effect of WS2.",

keywords = "Raman, WS, magneto-optical effect, substrate",

author = "Wuguo Liu and Zhongtao Lin and Shibing Tian and Yuan Huang and Huaqing Xue and Ke Zhu and Changzhi Gu and Yang Yang and Junjie Li",

note = "Publisher Copyright: {\textcopyright} 2021 by the authors.",

year = "2021",

month = feb,

doi = "10.3390/app11041599",

language = "English",

volume = "11",

journal = "Applied Sciences (Switzerland)",

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T1 - Plasmonic Effect on the Magneto-Optical Property of Monolayer WS2 Studied by Polarized-Raman Spectroscopy

AU - Liu, Wuguo

AU - Lin, Zhongtao

AU - Tian, Shibing

AU - Huang, Yuan

AU - Xue, Huaqing

AU - Zhu, Ke

AU - Gu, Changzhi

AU - Yang, Yang

AU - Li, Junjie

PY - 2021/2

Y1 - 2021/2

N2 - In recent years, the magneto-optical properties of two-dimensional transition metal disulfides have attracted more and more attention due to their further device applications in spintronics and valleytronics. However, to our knowledge, the plasmonic effect on the magneto-optical properties of WS2 has not been studied. In this work, monolayer WS2 transferred on SiO2/Si substrate and Au film were investigated respectively using polarized-Raman spectroscopy at 4 K under different magnetic fields. Prominent magnetic field–induced variations in the Raman intensities of WS2 samples were observed, which also exhibited significant differences in the spectral evolution versus magnetic field. The resonance magnetic field was 5 T and 5.5 T for the WS2 on SiO2/Si substrate and Au film, respectively. Remarkably, the magneto-optical Raman intensities of (Formula presented.) and 2LA(M) modes for WS2 on Au film were reduced to approximately 60% compared with that of WS2 on SiO2/Si. These results suggest that the plasmonic effect–induced charge transfer plays an important role in the magneto-optical Raman effect of WS2.

AB - In recent years, the magneto-optical properties of two-dimensional transition metal disulfides have attracted more and more attention due to their further device applications in spintronics and valleytronics. However, to our knowledge, the plasmonic effect on the magneto-optical properties of WS2 has not been studied. In this work, monolayer WS2 transferred on SiO2/Si substrate and Au film were investigated respectively using polarized-Raman spectroscopy at 4 K under different magnetic fields. Prominent magnetic field–induced variations in the Raman intensities of WS2 samples were observed, which also exhibited significant differences in the spectral evolution versus magnetic field. The resonance magnetic field was 5 T and 5.5 T for the WS2 on SiO2/Si substrate and Au film, respectively. Remarkably, the magneto-optical Raman intensities of (Formula presented.) and 2LA(M) modes for WS2 on Au film were reduced to approximately 60% compared with that of WS2 on SiO2/Si. These results suggest that the plasmonic effect–induced charge transfer plays an important role in the magneto-optical Raman effect of WS2.

KW - Raman

KW - WS

KW - magneto-optical effect

KW - substrate

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DO - 10.3390/app11041599

M3 - Article

AN - SCOPUS:85137636134

SN - 2076-3417

VL - 11

JO - Applied Sciences (Switzerland)

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M1 - 1599

ER -

Plasmonic Effect on the Magneto-Optical Property of Monolayer WS₂ Studied by Polarized-Raman Spectroscopy

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Keywords

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