Photoluminescence spectrum of highly excited single CdS nanocrystals studied by a scanning near-field optical microscope

Yoshihiko Kanemitsu, Takeshi J. Inagaki, Masanobu Ando, Kazunari Matsuda, Toshiharu Saiki, C. W. White

研究成果: Article

14 引用 (Scopus)

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.

元の言語English
ページ(範囲)141-143
ページ数3
ジャーナルApplied Physics Letters
81
発行部数1
DOI
出版物ステータスPublished - 2002 7 1
外部発表Yes

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optical microscopes
near fields
nanocrystals
photoluminescence
scanning
excitons
excitation
matrices
lasers
energy

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

これを引用

Photoluminescence spectrum of highly excited single CdS nanocrystals studied by a scanning near-field optical microscope. / Kanemitsu, Yoshihiko; Inagaki, Takeshi J.; Ando, Masanobu; Matsuda, Kazunari; Saiki, Toshiharu; White, C. W.

:: Applied Physics Letters, 巻 81, 番号 1, 01.07.2002, p. 141-143.

研究成果: Article

Kanemitsu, Yoshihiko ; Inagaki, Takeshi J. ; Ando, Masanobu ; Matsuda, Kazunari ; Saiki, Toshiharu ; White, C. W. / Photoluminescence spectrum of highly excited single CdS nanocrystals studied by a scanning near-field optical microscope. :: Applied Physics Letters. 2002 ; 巻 81, 番号 1. pp. 141-143.
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