Nonlinear optical absorption in Bi3TiNbO9 thin films using Z-scan technique

Bin Yang*, Hengzhi Chen, Mingfu Zhang, Feiyan Wang, Kok Wai CHEAH, Wenwu Cao

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

4 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)1017-1021
Number of pages5
JournalApplied Physics A: Materials Science and Processing
Issue number4
Publication statusPublished - Sept 2009

Scopus Subject Areas

  • Chemistry(all)
  • Materials Science(all)


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