Optical nonlinear properties of lanthanum-modified lead titanate thin film investigated by femtosecond Z-scan technique

摘要

We used the Z-scan technique for measuring the nonlinear optical properties of lanthanum-modified lead titanate thin films. The nonlinear optical refractive index n2 and the three-photon absorption coefficient were estimated to be (7.08±1.26)×10−11 esu and (2.05±0.54)×10-21 cm3/W2, respectively.