Optical properties of epitaxial and polycrystalline Sr1.8Ca0.2NaNb5O15thin-film waveguides grown by pulsed laser deposition

W. C. Liu, Chee Leung Mak, K. H. Wong, D. Y. Wang, H. L.W. Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

11 Citations (Scopus)

Abstract

Epitaxial and polycrystalline ferroelectric Sr1.8Ca0.2NaNb5O15thin films have been prepared by pulsed laser deposition on (100)MgO and fused quartz substrates, respectively. These films exhibit excellent surface flatness and high optical transmittance of about 80% over the whole visible region. Their good optical waveguide characteristics are demonstrated using prism coupling technique. Our results show that the internal scattering of the film is more influential in governing the propagation loss than the surface scattering, and that a heteroepitaxial growth of ferroelectric oxide films is essential for waveguide devices.
Original languageEnglish
Article number033507
JournalJournal of Applied Physics
Volume100
Issue number3
DOIs
Publication statusPublished - 23 Aug 2006

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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