Confocal micro-Raman imaging on 180°-domain structure in periodically poled stoichiometric LiNbO₃

• TANIGUCHI Hiroki

  Materials and Structures Laboratory, Tokyo Institute of Technology

• FUJII Yasuhiro

  Department of Physics and Mathematics, College of Science and Engineering, Aoyama Gakuin University

• ITOH Mitsuru

  Materials and Structures Laboratory, Tokyo Institute of Technology

Abstract

A domain structure in periodically poled stoichiometric LiNbO₃ was observed by confocal micro-Raman scanning spectroscopy. The 180°-domain, which is nominally invisible by Raman scattering due to equivalency of Raman selection rule for adjacent domains, was clearly visualized with a spatial resolution of 460 nm. At domain walls, an enhancement of Raman intensity was observed in optical modes that are closely related to the Nb–O bond, while there was no significant change in Li-ion related modes. Nb–O covalent bonds would be deformed by opposite ferroelectric displacements of ions across domain walls, to modify an electric polarizability of the Nb-ion related modes.

Journal

• Journal of the Ceramic Society of Japan

  Journal of the Ceramic Society of Japan 121 (1416), 579-582, 2013

  The Ceramic Society of Japan

Keywords

• Raman scattering
• Confocal microscopy
• Ferroelectric domain
• LiNbO₃

Details

• CRID: 1390001205286774400
• NII Article ID: 130004480171
• DOI: 10.2109/jcersj2.121.579
• ISSN: 13486535
• ISSN: 18820743
• Web Site: https://www.jstage.jst.go.jp/article/jcersj2/121/1416/121_JCSJ-P13024/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed