抄録
Many-body effects in strongly photoexcited single CdS nanocrystals embedded in Al2O3 matrices have been studied by a scanning near-field optical microscope at low temperatures. Under weak excitations, we find a sharp photoluminescence (PL) band originating from the exciton recombination. With an increase of the excitation laser energy, the PL intensity increases and the broad PL band is superimposed on the exciton-related sharp PL band. From a theoretical analysis, it was concluded that the broadening of the PL band is due to electron-hole pairs in CdS nanocrystals. The many-body effects of correlated exciton systems in CdS nanocrystals will be discussed.
本文言語 | English |
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ページ(範囲) | 141-143 |
ページ数 | 3 |
ジャーナル | Applied Physics Letters |
巻 | 81 |
号 | 1 |
DOI | |
出版ステータス | Published - 2002 7月 1 |
外部発表 | はい |
ASJC Scopus subject areas
- 物理学および天文学(その他)