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

Y. Kanemitsu, M. Ando, K. Matsuda, T. 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 Apr
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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