Deep-ultraviolet Raman scattering studies of monolayer graphene thin films

Hsiang Lin Liu, Syahril Siregar, Eddwi H. Hasdeo, Yasuaki Kumamoto, Chih Chiang Shen, Chia Chin Cheng, Lain Jong Li, Riichiro Saito, Satoshi Kawata

研究成果: Article査読

23 被引用数 (Scopus)

抄録

We present joint experimental and theoretical investigations of the deep-ultraviolet Raman scattering spectra of monolayer graphene thin films. We found that upon a 266 nm laser excitation, while the G mode remains pronounced, the G0 mode is not observed. The G0 mode exhibits distinctive linewidth broadening towards the ultraviolet frequency region. The peak intensity ratio of the G0 and G modes increases dramatically excited at 355, 532, and 785 nm wavelengths. All of the experimental findings are in good agreement with the theory calculated by the tight-binding method. We theoretically show that the integrated intensity of the G0 mode is inversely proportional to the incident photon energy, whereas that of the G mode increases as the fourth power of the incident photon energy. These results extend our understanding of the double resonance Raman scattering process of graphene away from the Dirac cones and provide the foundation for future technologically important developments of graphene in the deep-ultraviolet frequency range.

本文言語English
ページ(範囲)807-813
ページ数7
ジャーナルCarbon
81
1
DOI
出版ステータスPublished - 2015

ASJC Scopus subject areas

  • 化学 (全般)
  • 材料科学(全般)

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