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

doi:10.1063/1.1490141

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 › 査読

17 被引用数 (Scopus)

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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
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	https://doi.org/10.1063/1.1490141
出版ステータス	Published - 2002 7 1
外部発表	はい

ASJC Scopus subject areas

物理学および天文学（その他）

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10.1063/1.1490141

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abstract = "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.",

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AU - Kanemitsu, Yoshihiko

AU - Inagaki, Takeshi J.

AU - Ando, Masanobu

AU - Matsuda, Kazunari

AU - Saiki, Toshiharu

AU - White, C. W.

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N2 - 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.

AB - 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.

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

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