Excitonic absorption spectra and Sommerfeld factors of one-dimensional systems

Tetsuo Ogawa, Toshihide Takagahara

研究成果: Article査読

9 被引用数 (Scopus)

抄録

We investigate theoretically optical absorption spectra near a hand edge for one-dimensional (1D) semiconductors with a direct band gap. taking 1D Wannier-type exciton effects into account. The Sommerfeld factor, which is the absorption intensity ratio of the continuum exciton to the free electron-hole pair above the hand edge, is found to be smaller than unity for an allowed transition in striking contrast to the three- and two-dimensional cases. This peculiar feature is interpreted in terms of the anomalously strong concentration of the oscillator strength on the lowest discrete exciton state.

本文言語English
ページ(範囲)506-511
ページ数6
ジャーナルSurface Science
263
1-3
DOI
出版ステータスPublished - 1992 2月 19
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学
  • 表面および界面
  • 表面、皮膜および薄膜
  • 材料化学

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