Symmetry breaking of in-plane Raman scattering by elliptically polarized light in MoS2

Teng De Huang*, Kristan Bryan Simbulan, Yu Fan Chiang, Yann Wen Lan, Ting Hua Lu

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

摘要

The breaking of the doubly degenerate in-plane lattice vibrations in monolayer, bilayer, and bulk molybdenum disulfide (MoS2) are oftentimes ignored in the analysis of the material's lattice behaviors due to the lack of variation of polarization for the excitation light. In this work, we have observed variations in the relative intensity of the two most dominant Raman peaks of MoS2 via polarized micro-Raman spectroscopy using elliptically polarized incident light. The use of elliptically polarized light has demonstrated distinct properties in its incident Raman polarization vector. This gives an additional degree of freedom affecting the relationship between the x (E2gx1) and y (E2gy1) components of the material's in-plane lattice vibrations. The different ratio of the magnitudes for the E2gx1 and E2gy1 in the lattice vibrations can be induced by changing the polarization state of the incident light. This work investigates the material's unexplored fundamental phonon property that may enlighten past and future studies involving phonon behaviors.

原文英語
文章編號195414
期刊Physical Review B
100
發行號19
DOIs
出版狀態已發佈 - 2019 十一月 12

ASJC Scopus subject areas

  • 電子、光磁材料
  • 凝聚態物理學

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