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

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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.

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Authors and Affiliations

  1. Department of Physics, Fudan University, Shanghai 200433, P.R. China, , , , , , CN

    Y. Liu, D. Li, R.Y. Zhu, G.J. You & S.X. Qian

  2. State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai 200050, P.R. China, , , , , , CN

    Y. Yang & J.L. Shi

Authors
  1. Y. Liu
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  2. D. Li
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  3. R.Y. Zhu
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  4. G.J. You
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  5. S.X. Qian
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  6. Y. Yang
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  7. J.L. Shi
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Additional information

Received: 13 May 2002 / Revised version: 23 October 2002 / Published online: 3 April 2003

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ID="*"Corresponding author. Fax: +86-21/6510-4949, E-mail: sxqian@fudan.ac.cn

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Liu, Y., Li, D., Zhu, R. et al. Third-order nonlinear optical response of Au-core CdS-shell composite nanoparticles embedded in BaTiO3 thin films . Appl Phys B 76, 435–439 (2003). https://doi.org/10.1007/s00340-002-1068-4

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  • DOI: https://doi.org/10.1007/s00340-002-1068-4

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