Anisotropy of induced birefringence in ferroelectrics with pseudoilmenite structure


Kurt M. Z. , Mamedov A., Kiymac K.

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, cilt.42, ss.140-143, 2003 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 42 Konu: 1
  • Basım Tarihi: 2003
  • Doi Numarası: 10.1143/jjap.42.140
  • Dergi Adı: JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS
  • Sayfa Sayısı: ss.140-143

Özet

An analysis of the nature of anisotropy of the optical properties of LiTaO3 is presented on the basis (of the features) of its intrinsic crystallographical properties. Electrooptically induced refractive-index change in the regular and reverse-poled LiTaO3 is calculated. Specifically we determine how the index change depends on electric field magnitude and direction in y-propagating extraordinary modes. To accomplish this, changes in index-ellipsoid shape and orientation are determined by use of a numerical eigenvalue procedure for diagonalizing the impermeability tensor; then the refractive index is calculated by vector reference-frame transformation and small perturbation approximation. The general formula is inferred from calculations for specific field directions. Electrooptic coefficients for the reverse-poled LiTaO3 are obtained tensor reference-frame transformation of those of LiTaO3.