Sharp photoluminescence of CdS nanocrystals in Al{sub 2}O{sub 3} matrices formed by sequential ion implantation
We report on photoluminescence (PL) experiments in CdS nanocrystals fabricated by sequential ion implantation in Al{sub 2}O{sub 3} matrices. The PL spectrum and the spatial image of the PL intensity have been studied at 8 K using a scanning near-field optical microscope. The PL spectrum at each bright spot has been found to consist of narrow lines of various energies, although the spectrum measured by conventional optics shows a single and broad band locating below the free-exciton absorption energy. The origin of the sharp PL lines in CdS nanocrystals will be discussed.
- Research Organization:
- Oak Ridge National Laboratory
- Sponsoring Organization:
- (US)
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 40277902
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 4 Vol. 79; ISSN 0003-6951
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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