Composition dependence of electrooptic property of epitaxial (Pb,La)(Zr,Ti)O3 films

Hiromi Shima, Takashi Iijima, Takashi Nakajima, Soichiro Okamura

Research output: Contribution to journalArticlepeer-review

Abstract

The Zr/Ti ratio dependence of refractive index and electrooptic coefficient of epitaxial (Pb,La)(Zr,Ti)O3 (PLZT) films were investigated. PLZT films were fabricated on La-doped SrTiO3 (La-STO) substrates by a chemical solution deposition (CSD) method. Optical properties in TE-and TM-modes were measured individually using a prism coupling method. The refractive indexes both in TE-and TM-modes were as large as that of the polycrystalline film, and increased with increasing Ti/(Zr + Ti) ratio. The refractive index in TE-mode was larger than that in TM-mode because the PLZT films received compressive stress from the La-STO substrates due to lattice mismatch. The refractive index in TM-mode almost linearly decreased with increasing applied an electric field while that in TE-mode slightly increased and saturated around at 200 kV/cm. The Pockels coefficient in TM-mode r33 showed large change for compositions, while that in TE-mode r13 showed little change. The maximum Pockels coefficient rc of 156 pm/V was obtained for the epitaxial PLZT film with Ti/(Zr + Ti) ratio of 50%.

Original languageEnglish
Pages (from-to)636-639
Number of pages4
JournalJournal of the Ceramic Society of Japan
Volume118
Issue number1380
DOIs
Publication statusPublished - 2010 Aug

Keywords

  • Composition dependence
  • Electrooptic effect
  • Epitaxial film
  • PLZT
  • Zr/Ti

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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