Photoluminescence spectra and dynamics of single CdS nanocrystals studied by scanning near-field optical microscopy

Y. Kanemitsu, M. Ando, K. Matsuda, Toshiharu Saiki, C. W. White

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Photoluminescence (PL) spectra and dynamics of hexagonal CdS nanocrystals embedded in Al2O3 matrices have been studied by means of a scanning near-field optical microscope at 8 K. The PL spectra of individual CdS nanocrystals show narrow lines with single-exponential decay profiles, although the macroscopic PL spectra measured by conventional optics show a broad band with non-exponential decay profiles. The PL peaks are observed at energies below the lowest free-exciton energy of CdS nanocrystals. The luminescence mechanism of CdS nanocrystals is discussed.

Original languageEnglish
Pages (from-to)537-540
Number of pages4
JournalPhysica Status Solidi (A) Applied Research
Volume190
Issue number2
DOIs
Publication statusPublished - 2002
Externally publishedYes

Fingerprint

Near field scanning optical microscopy
Nanocrystals
near fields
Photoluminescence
nanocrystals
microscopy
photoluminescence
scanning
decay
profiles
optical microscopes
Excitons
Luminescence
Optics
Microscopes
excitons
optics
luminescence
broadband
Scanning

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Photoluminescence spectra and dynamics of single CdS nanocrystals studied by scanning near-field optical microscopy. / Kanemitsu, Y.; Ando, M.; Matsuda, K.; Saiki, Toshiharu; White, C. W.

In: Physica Status Solidi (A) Applied Research, Vol. 190, No. 2, 2002, p. 537-540.

Research output: Contribution to journalArticle

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