抄録
The exciton radiative lifetime in ZnO nanorods is studied. It is found that the exciton radiative lifetime increases with temperature as T2. Furthermore, the spectral linewidth of the photoluminescence of the ZnO nanorods also increases with temperature as T2, suggesting a linear dependence of exciton radiative lifetime on the spectral linewidth. The physics behind is that the oscillator strength of excitons at k=0 is shared equally among all the states within the spectral linewidth and the coherence extension of an exciton decreases with temperature due to the scattering by phonons, defects, or impurities.
本文言語 | English |
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論文番号 | 013107 |
ジャーナル | Applied Physics Letters |
巻 | 90 |
号 | 1 |
DOI | |
出版ステータス | Published - 2007 |
外部発表 | はい |
ASJC Scopus subject areas
- 物理学および天文学(その他)