Effect of lanthanum doping on linear and nonlinear-optical properties of Bi3TiNbO9 thin films

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

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5 Scopus citations


Lanthanum doped Bi3TiNbO9 thin films (LBTN-x, La 3+ contents x = 5%, 15%, 25% and 35 mol.%) with layered perovskite structure were fabricated on fused silica by pulsed laser deposition method. Their linear and nonlinear optical properties were studied by transmittance measurement and Z-Scan method. All films exhibit good transmittance (>55%) in visible region. For lanthanum doping content are x = 5%, 15% and 25 mol.%, the nonlinear absorption coefficient of LBTN-x thin films increases with the La 3+ content, then it drops down at x = 35 mol.% when the content of La3+ in (Bi2O2)2+ layers is high enough to aggravate the orthorhombic distortion of the octahedra. We found that, 25 mol.% is the optimal La3+ content for LBTN-x thin films to have the largest nonlinear absorption coefficient making the LBTN-x film a promising candidate for absorbing-type optical device applications.

Original languageEnglish (US)
Pages (from-to)5364-5367
Number of pages4
JournalJournal of Alloys and Compounds
Issue number17
StatePublished - Apr 28 2011

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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