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- Title
Nonlinear optical absorption in Bi<sub>3</sub>TiNbO<sub>9</sub> thin films using Z-scan technique.
- Authors
Yang, Bin; Chen, Hengzhi; Zhang, Mingfu; Wang, Feiyan; Cheah, Kokwai; Cao, Wenwu
- Abstract
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 (00 l) 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.
- Subjects
THIN films; PEROVSKITE; PULSED laser deposition; FUSED silica; ELECTRIC oscillators
- Publication
Applied Physics A: Materials Science & Processing, 2009, Vol 96, Issue 4, p1017
- ISSN
0947-8396
- Publication type
Article
- DOI
10.1007/s00339-009-5136-z