Abstract
We present the studies of the third- and higher-order nonlinear optical processes in barium titanate () and strontium titanate () nanoparticles. We measured the nonlinear refractive indices and nonlinear absorption coefficients of the and nanoparticles dissolved in ethylene glycol using the fs and ps pulses. The high-order harmonic generation up to the 39th order was achieved in the and nanoparticles-contained plumes when the femtosecond radiation propagated through the preformed plasma. The and high-order harmonic efficiencies at the plateau region were achieved in the cases of the and nanoparticles-contained plasmas.
© 2008 Optical Society of America
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