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

Bin Yang, Hengzhi Chen, Mingfu Zhang, Feiyan Wang, Kokwai Cheah, Wenwu Cao

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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 (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 (US)
Pages (from-to)1017-1021
Number of pages5
JournalApplied Physics A: Materials Science and Processing
Volume96
Issue number4
DOIs
StatePublished - Sep 2009

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Chemistry(all)

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