Applied Physics B

, Volume 76, Issue 4, pp 435–439

Third-order nonlinear optical response of Au-core CdS-shell composite nanoparticles embedded in BaTiO3 thin films

Authors

  • Y. Liu
    • Department of Physics, Fudan University, Shanghai 200433, P.R. China
  • D. Li
    • Department of Physics, Fudan University, Shanghai 200433, P.R. China
  • R.Y. Zhu
    • Department of Physics, Fudan University, Shanghai 200433, P.R. China
  • G.J. You
    • Department of Physics, Fudan University, Shanghai 200433, P.R. China
  • S.X. Qian
    • Department of Physics, Fudan University, Shanghai 200433, P.R. China
  • Y. Yang
    • State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai 200050, P.R. China
  • J.L. Shi
    • State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai 200050, P.R. China

DOI: 10.1007/s00340-002-1068-4

Cite this article as:
Liu, Y., Li, D., Zhu, R. et al. Appl Phys B (2003) 76: 435. doi:10.1007/s00340-002-1068-4

Abstract.

Au-core CdS-shell composite nanoparticles were synthesized by a direct self-assembly process and integrated into BaTiO3 thin films. Characterization by transmission electron microscopy showed that the average diameter of these composite nanoparticles was about 8 nm. Using the femtosecond time-resolved optical Kerr effect method, we investigated the third-order nonlinear optical response of the Au@CdS nanoparticles embedded in the BaTiO3 thin films at a wavelength of 800 nm. An ultrafast nonlinear response and a large effective third-order nonlinear susceptibility of χ(3)=7.7×10-11 esu were observed. We attributed the enhancement of the third-order optical nonlinearity to a localized electric field effect originating from the core-shell structure under off-surface-plasmon resonance conditions.

PACS: 42.65.Sf; 78.66.Sq; 78.67.Bf

Copyright information

© Springer-Verlag 2003