Optical and nonlinear optical properties of Cobalt doped ZnO nanostructures

B. Karthikeyan; Suchand C. S. Sandeep; Reji Philip

doi:10.1117/12.824519

21 August 2009 Optical and nonlinear optical properties of Cobalt doped ZnO nanostructures

B. Karthikeyan, Suchand C. S. Sandeep, Reji Philip

Proceedings Volume 7393, Nanophotonic Materials VI; 739303 (2009) https://doi.org/10.1117/12.824519
Event: SPIE NanoScience + Engineering, 2009, San Diego, California, United States

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.

Citation Download Citation

B. Karthikeyan, Suchand C. S. Sandeep, and Reji Philip "Optical and nonlinear optical properties of Cobalt doped ZnO nanostructures", Proc. SPIE 7393, Nanophotonic Materials VI, 739303 (21 August 2009); https://doi.org/10.1117/12.824519

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