Photoluminescence Properties of Single Mn-Doped CdS Nanocrystals Studied by Scanning Near-Field Optical Microscopy

Journal Article · Sat Jan 01 04:00:00 EST 2005 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2058228· OSTI ID:1003055

Ishizumi, A. ^[1]; Matsuda, K. ^[2]; Saiki, T. ^[2]; White, Clark W ^[3]; Kanemitsu, Y. ^[4]

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1. Nara Institute of Science and Technology, Nara, Japan
2. Kanagawa Academy of Science and Technology, Kawasaki, Japan
3. ORNL
4. Kyoto University, Japan

We have fabricated Mn-doped CdS (CdS:Mn) nanocrystals embedded in Al{sub 2}O{sub 3} matrices by sequential ion implantation and studied their photoluminescence (PL) properties by a scanning near-field optical microscope (SNOM). In the PL spectra of CdS:Mn nanocrystals measured by the SNOM, several sharp PL lines and a broad PL band were observed. The sharp PL lines are related to bound excitons at shallow impurities in CdS nanocrystals. The Mn-related PL spectrum is very broad even in single nanocrystals at low temperatures, and both the peak energy and the spectral width of the PL band depend on the excitation laser intensity. The PL properties of single CdS:Mn nanocrystals are discussed.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1003055
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 13 Vol. 87; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CADMIUM COMPOUNDS
ENERGY
EXCITATION
EXCITONS
IMPURITIES
ION IMPLANTATION
LASERS
MANGANESE
MATERIALS
MATRICES
NANOSTRUCTURES
OPTICAL MICROSCOPES
OPTICAL MICROSCOPY
PHOTOLUMINESCENCE
SPECTRA
TEMPERATURE RANGE 0065-0273 K