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Proceedings Paper

Optical and nonlinear optical properties of Cobalt doped ZnO nanostructures
Author(s): B. Karthikeyan; Suchand C. S. Sandeep; Reji Philip
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Paper Abstract

Cobalt doped zinc oxide nanostructures were prepared in room temperature through a wet chemical method. X-Ray diffraction studies confirm that the prepared particles have a hexagonal wurtzite structure. The morphology of the particles is found from Scanning Electron Microscopy. Optical absorption measurements reveal the presence of an exciton peak at 375 nm (3.31 eV). Excitation at 330 nm shows photoluminescence arising from exciton recombination and oxygen vacancies. Open aperture z-scan measurements using 5 ns laser pulses at 532 nm reveal an optical limiting behavior arising from three-photon absorption, which gets enhanced for higher concentrations of Co.

Paper Details

Date Published: 21 August 2009
PDF: 6 pages
Proc. SPIE 7393, Nanophotonic Materials VI, 739303 (21 August 2009); doi: 10.1117/12.824519
Show Author Affiliations
B. Karthikeyan, National Institute of Technology, Tiruchirappalli (India)
Suchand C. S. Sandeep, Raman Research Institute (India)
Reji Philip, Raman Research Institute (India)

Published in SPIE Proceedings Vol. 7393:
Nanophotonic Materials VI
Stefano Cabrini; Taleb Mokari, Editor(s)

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