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

  • Y. Liu
  • D. Li
  • R.Y. Zhu
  • G.J. You
  • S.X. Qian
  • Y. Yang
  • J.L. Shi

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

Authors and Affiliations

  • Y. Liu
    • 1
  • D. Li
    • 1
  • R.Y. Zhu
    • 1
  • G.J. You
    • 1
  • S.X. Qian
    • 1
  • Y. Yang
    • 3
  • J.L. Shi
    • 3
  1. 1.Department of Physics, Fudan University, Shanghai 200433, P.R. ChinaCN
  2. 2.Surface Physics Lab (National Key Lab), Fudan University, Shanghai 200433, P.R. ChinaCN
  3. 3.State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai 200050, P.R. ChinaCN