Large electro-optic effect in single-crystal Pb (Zr,Ti) O3 (001) measured by spectroscopic ellipsometry

Tae Dong Kang, Bo Xiao, Vitaliy Avrutin, Ümit Özgür, Hadis Morko̧, Jun Woo Park, Ho Suk Lee, Hosun Lee, Xiaoyu Wang, David Smith

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19 Scopus citations

Abstract

Using spectroscopic ellipsometry electro-optic effect was studied in lead zirconate titanate (PZT) thin films grown epitaxially on Nb-doped SrTiO3 (001) substrates by RF magnetron sputtering. A uniaxial multilayer model analysis was applied to extract the linear and quadratic electro-optic coefficients from the shifts in the ordinary and extraordinary refractive indices with electric field applied along the (001) direction. The effective linear and quadratic coefficients were measured as -134.6× 10-12 m/V and 8.5× 10-18 m2 / V2, respectively, at a wavelength of 632.8 nm, while the individual linear electro-optic coefficients r33 and r13 were -157.1 and 22 pm/V, respectively. The existence of the linear electro-optic effect in unpoled PZT films was attributed to the presence of a built-in polarization and simultaneous poling during measurements.

Original languageEnglish (US)
Article number093103
JournalJournal of Applied Physics
Volume104
Issue number9
DOIs
StatePublished - 2008

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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