Selection rule for the optical absorption of graphene nanoribbons

Han Hsu, L. E. Reichl

研究成果: 雜誌貢獻期刊論文同行評審

100 引文 斯高帕斯(Scopus)

摘要

We demonstrate that the optical absorption of zigzag-edge graphene nanoribbons is qualitatively different from that of armchair nanotubes. Unlike the selection rule for nanotubes, when the incident beam is polarized along the longitudinal direction, the interband transitions at direct gaps are forbidden for graphene nanoribbons. This selection rule is due to the finite width of graphene nanoribbons. We also demonstrate that the edge states of graphene nanoribbons play an important role in the optical absorption. They are involved in many of the absorption peaks within optical range ( ω<0.12 a.u.) and have no contribution to the absorption peaks beyond optical range.

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文章編號045418
期刊Physical Review B - Condensed Matter and Materials Physics
76
發行號4
DOIs
出版狀態已出版 - 19 7月 2007

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