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

Research output: Contribution to journalArticle

13 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)141-143
Number of pages3
JournalApplied Physics Letters
Volume81
Issue number1
DOIs
Publication statusPublished - 2002 Jul 1
Externally publishedYes

Fingerprint

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

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

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.

In: Applied Physics Letters, Vol. 81, No. 1, 01.07.2002, p. 141-143.

Research output: Contribution to journalArticle

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. In: Applied Physics Letters. 2002 ; Vol. 81, No. 1. pp. 141-143.
@article{d4538eee213943f196799f91a18df18d,
title = "Photoluminescence spectrum of highly excited single CdS nanocrystals studied by a scanning near-field optical microscope",
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.",
author = "Yoshihiko Kanemitsu and Inagaki, {Takeshi J.} and Masanobu Ando and Kazunari Matsuda and Toshiharu Saiki and White, {C. W.}",
year = "2002",
month = "7",
day = "1",
doi = "10.1063/1.1490141",
language = "English",
volume = "81",
pages = "141--143",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "1",

}

TY - JOUR

T1 - Photoluminescence spectrum of highly excited single CdS nanocrystals studied by a scanning near-field optical microscope

AU - Kanemitsu, Yoshihiko

AU - Inagaki, Takeshi J.

AU - Ando, Masanobu

AU - Matsuda, Kazunari

AU - Saiki, Toshiharu

AU - White, C. W.

PY - 2002/7/1

Y1 - 2002/7/1

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.

UR - http://www.scopus.com/inward/record.url?scp=79956033692&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79956033692&partnerID=8YFLogxK

U2 - 10.1063/1.1490141

DO - 10.1063/1.1490141

M3 - Article

VL - 81

SP - 141

EP - 143

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 1

ER -