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.
| 元の言語 | English |
|---|---|
| ページ（範囲） | 506-511 |
| ページ数 | 6 |
| ジャーナル | Surface Science |
| 巻 | 263 |
| 発行部数 | 1-3 |
| DOI | |
| 出版物ステータス | Published - 1992 2 19 |
| 外部発表 | Yes |
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ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Condensed Matter Physics
- Surfaces and Interfaces
これを引用
Excitonic absorption spectra and Sommerfeld factors of one-dimensional systems. / Ogawa, Tetsuo; Takagahara, Toshihide.
：: Surface Science, 巻 263, 番号 1-3, 19.02.1992, p. 506-511.研究成果: Article
}
TY - JOUR
T1 - Excitonic absorption spectra and Sommerfeld factors of one-dimensional systems
AU - Ogawa, Tetsuo
AU - Takagahara, Toshihide
PY - 1992/2/19
Y1 - 1992/2/19
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0026817928&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0026817928&partnerID=8YFLogxK
U2 - 10.1016/0039-6028(92)90398-P
DO - 10.1016/0039-6028(92)90398-P
M3 - Article
AN - SCOPUS:0026817928
VL - 263
SP - 506
EP - 511
JO - Surface Science
JF - Surface Science
SN - 0039-6028
IS - 1-3
ER -