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 |
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ページ(範囲) | 506-511 |
ページ数 | 6 |
ジャーナル | Surface Science |
巻 | 263 |
号 | 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