Characterization of nanographite and carbon nanotubes by polarization dependent optical spectroscopy

Alexander Grüneis, Riichiro Saito, Georgii G. Samsonidze, Marcos A. Pimenta, Ado Jorio, Antonio G. Souza Filho, Gene Dresselhaus, Mildred S. Dresselhaus

研究成果: Conference article

抄録

The optical absorption for π electrons as a function of the electron wavevector k is investigated by first order perturbation theory in graphite and single wall carbon nanotubes (SWNTs). The matrix element connecting two states in the valence and conduction bands is found to be significantly anisotropic k-space and polarization dependent. In the case of graphite, the absorption shows a node around the equi-energy contour, and in the case of SWNTs we obtain selection rules that allow only transitions between certain pairs of subbands. The strength of the optical absorption is not only diameter dependent but also chirality dependent. The implications of the optical absorption matrix element on the resonant conditions are discussed.

本文言語English
ページ(範囲)523-528
ページ数6
ジャーナルMaterials Research Society Symposium - Proceedings
737
出版ステータスPublished - 2003 7 25
外部発表はい
イベントQuantum Confined Semiconductor Nanostructures - Boston MA, United States
継続期間: 2002 12 22002 12 5

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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