Fabrication of Ba2TiGe2O8 thin film with optical nonlinearity

Ryoh Ogawa, Hirokazu Masai, Yoshihiro Takahashi, Hiroshi Mori, Takumi Fujiwara, Takayuki Komatsu

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


We have successfully fabricated a glass thin film in the BaO-TiO 2-GeO2 system and a fresnoite-type Ba2TiGe 2O8 (BTG) crystalline thin film with second-order optical nonlinearity for the first time. An as-deposited glass thin film showing good transparency and homogeneity could be formed on a fused silica substrate by RF sputtering with a 30BaO-15TiO2-55GeO2 glass target. Subsequently, a transparent BTG-crystallized thin film could be obtained using proper heat-treatment conditions. Furthermore, a clear second-harmonic generation has been observed by the Maker fringe technique in the transparent BTG-crystallized thin films obtained by heat treatment at 730-750°C for 3h.

Original languageEnglish
Pages (from-to)7145-7147
Number of pages3
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Issue number10 B
Publication statusPublished - 2007 Oct 22


  • Crystallization
  • Fresnoit-type phase
  • Glass
  • Second-order optical nonlinearlty
  • Thin film

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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