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 language | English |
|---|---|
| Pages (from-to) | 141-143 |
| Number of pages | 3 |
| Journal | Applied Physics Letters |
| Volume | 81 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2002 Jul 1 |
| Externally published | Yes |
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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 journal › Article
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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
AN - SCOPUS:79956033692
VL - 81
SP - 141
EP - 143
JO - Applied Physics Letters
JF - Applied Physics Letters
SN - 0003-6951
IS - 1
ER -