Department of Physics
Nonlinear optical absorption in Bi3TiNbO9 thin films using Z-scan technique
Bi3TiNbO9 (BTN) thin films with layered perovskite structure were fabricated on fused silica by pulsed laser deposition. The XRD pattern revealed that the films are single-phase perovskite and highly (00l) textured. Their fundamental optical constants, such as band gap, linear refractive index, and linear absorption coefficient, were obtained by optical transmittance measurements. The dispersion relation of the refractive index vs. wavelength follows the single electronic oscillator model. The nonlinear optical absorption of the films was investigated by single beam Z-scan method at a wavelength of 800 nm with laser duration of 80 fs. We obtained the nonlinear absorption coefficient β=1.44×10-7 m/W. The results show that the BTN thin films are promising for applications in absorbing-type optical devices. © 2009 Springer-Verlag.
Source Publication Title
Applied Physics A-Materials Science & Processing
Yang, Bin, Hengzhi Chen, Mingfu Zhang, Feiyan Wang, Kokwai Cheah, and Wenwu Cao. "Nonlinear optical absorption in Bi3TiNbO9 thin films using Z-scan technique." Applied Physics A-Materials Science & Processing 96.4 (2009): 1017-1021.