Department of Physics
Effect of lanthanum doping on linear and nonlinear-optical properties of Bi3TiNbO9 thin films
Lanthanum doped Bi3TiNbO9 thin films (LBTN-x, La 3+ contents x = 5%, 15%, 25% and 35 mol.%) with layered perovskite structure were fabricated on fused silica by pulsed laser deposition method. Their linear and nonlinear optical properties were studied by transmittance measurement and Z-Scan method. All films exhibit good transmittance (>55%) in visible region. For lanthanum doping content are x = 5%, 15% and 25 mol.%, the nonlinear absorption coefficient of LBTN-x thin films increases with the La 3+ content, then it drops down at x = 35 mol.% when the content of La3+ in (Bi2O2)2+ layers is high enough to aggravate the orthorhombic distortion of the octahedra. We found that, 25 mol.% is the optimal La3+ content for LBTN-x thin films to have the largest nonlinear absorption coefficient making the LBTN-x film a promising candidate for absorbing-type optical device applications. © 2011 Elsevier B.V.
Lanthanum doped Bi3TiNbO 9, Nonlinear optical absorption, Optical constant, Pulsed laser deposition
Source Publication Title
Journal of Alloys And Compounds
Chen, Hengzhi, Bin Yang, Mingfu Zhang, Feiyan Wang, Kokwai Cheah, and Wenwu Cao. "Effect of lanthanum doping on linear and nonlinear-optical properties of Bi3TiNbO9 thin films." Journal of Alloys And Compounds 509.17 (2011): 5364-5367.