Abstract
Rh-doped barium titanate (BaTiO3) epitaxial thin films have been fabricated onSrTiO3 (100) substrates by pulsed laser deposition. The nonlinear opticalproperties of the films were determined using the z-scan method at a wavelengthof 532 nm with a laser duration of 10 ns. The real and imaginary parts of thethird-order nonlinear susceptibility χ(3) were 5.71×10-7 esuand 9.59×10-8 esu, respectively. The real part value of χ(3)of the Rh:BaTiO3 films is about one order larger than that ofCe-doped BaTiO3 thin films. The results show that Rh:BaTiO3 thinfilms have great potential applications for nonlinear optical devices.
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