The electro-optic properties of epitaxial KTaxNb1-xO3 thin films

B. H. Hoerman, B. M. Nichols, B. W. Wessels*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


The electro-optic properties of epitaxial KTaxNb1-xO3 thin films were measured throughout the entire solid solution range, 0≤x≤1. For unpoled films, electro-optic coefficients measured at 100kHz exhibited an average value of 4.7pm/V at x=0 and a monotonic decrease with increasing Ta concentration. Upon poling with a DC bias field to align ferroelectric domains, the electro-optic response of the films increased. Under the DC bias field, the electro-optic coefficient exhibited two local maxima with respect to composition of 40 and 30pm/V at x≈0.20 and x≈0.70, respectively. These maxima correspond to the room temperature phase boundaries of the KTaxNb1-xO3 thin film system. The observation of a sharp maximum in the DC bias field response of the EO effect at x≈0.70 gives evidence of easy domain alignment at the ferroelectric phase boundary.

Original languageEnglish (US)
Pages (from-to)377-382
Number of pages6
JournalOptics Communications
Issue number1-6
StatePublished - Apr 15 2003

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering


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