Optical properties of Bi2.25La0.75TiNbO9 thin films grown on fused silica substrates by PLD

Mingfu Zhang, Bin Yang, Hengzhi Chen, Wenwu Cao

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6 Scopus citations


Layered-perovskite ferroelectric Bi2.25La0.75TiNbO9 (LBTN-0.75) optical waveguiding thin films have been prepared on fused silica substrates by pulsed laser deposition (PLD). X-ray θ-2θ scans revealed that the films are single-phase perovskite. The optical properties, such as the wavelength dependence of the transmittance and the refractive index, were determined. The average transmittance of the film is 75% in the wavelength range of 200-1100 nm and the band gap Eg = 3.46 eV. The optical waveguiding properties of the films were characterized by using prism coupling method. The distinct m-lines of the guided transverse electric (TE) and transverse magnetic (TM) modes of the LBTN-0.75 films waveguide have been observed. The film homogeneity and the film-substrate interface were analyzed using the inverse Wentzel-Kramer-Brillouin (iWKB) method.

Original languageEnglish (US)
Pages (from-to)406-409
Number of pages4
JournalOptical Materials
Issue number2
StatePublished - Dec 2009

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • General Computer Science
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrical and Electronic Engineering


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