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Optics Letters

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  • Vol. 27, Iss. 12 — Jun. 15, 2002
  • pp: 1043–1045

Size and dielectric dependence of the third-order nonlinear optical response of Au nanocrystals embedded in matrices

Guohong Ma, Wanxin Sun, Sing-Hai Tang, Hanzhuang Zhang, Zexiang Shen, and Shixiong Qian  »View Author Affiliations


Optics Letters, Vol. 27, Issue 12, pp. 1043-1045 (2002)
http://dx.doi.org/10.1364/OL.27.001043


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Abstract

The third-order nonlinear optical response of Au nanocrystals embedded in BaTiO<sub>3</sub> and ZrO<sub>2</sub> matrices was investigated through the off-resonance femtosecond optical Kerr effect. Compared with pristine films, the nonlinearity of composite films shows an enhancement that depends on the sizes of Au particles and the refractive index of the matrices. We performed a calculation based on Lorenz–Mie scattering theory to explain the experimental results. Additionally, the nonlinearity was optimized by determination of the values of the particle size and the refractive index of the matrix.

© 2002 Optical Society of America

OCIS Codes
(160.3900) Materials : Metals
(190.3270) Nonlinear optics : Kerr effect
(190.4400) Nonlinear optics : Nonlinear optics, materials
(320.2250) Ultrafast optics : Femtosecond phenomena

Citation
Guohong Ma, Wanxin Sun, Sing-Hai Tang, Hanzhuang Zhang, Zexiang Shen, and Shixiong Qian, "Size and dielectric dependence of the third-order nonlinear optical response of Au nanocrystals embedded in matrices," Opt. Lett. 27, 1043-1045 (2002)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-27-12-1043


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