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Nonlinear optical properties of self-organized complex oxide Ce:BaTiO3 quantum dots grown by pulsed laser deposition

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7 Author(s)
Shi, Wensheng ; Laboratory of Optical Physics, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100080, People’s Republic of China ; Chen, Zhenghao ; Liu, Ningning ; Lu, Huibin
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Ordered self-organized complex oxide Ce:BaTiO3 quantum dots shaped as a pyramid with a square base were fabricated by pulsed laser deposition. The density of the quantum dots was about 140 μm-2. The nonlinear optical properties were determined by the single beam Z scan method at a wavelength of 0.532 μm with a laser duration of 10 ns. The nonlinear refractive indices of the wetting layer and the self-organized ordered quantum dots were 8.87×10-8 and 6.39×10-7esu, respectively. The mechanisms of the nonlinear effect enhancement for these low-dimensional structures are discussed. © 1999 American Institute of Physics.

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Applied Physics Letters  (Volume:75 ,  Issue: 11 )