Investigation of electric internal field in congruent LiNbO3 by electro-optic effect

• We investigate the effect of the defect-induced internal field on the electro-optic behavior of z-cut congruent lithium niobate crystals. We measure, by a spatially resolved interferometric technique, the phase retardation due to an external applied voltage occurring in two regions with opposite ferroelectric polarization. When measurements are performed just after electrical poling, the two opposite domains show a different electro-optic behavior. We interpret this as due to an elastic component of the internal field. In fact, the asymmetric behavior disappears when the sample is thermally annealed, i.e., when the internal field vanishes

Ämnesord

NATURVETENSKAP  -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)

Nyckelord

Lithium-Niobate; Intrinsic Defects; Domain Reversal; Crystals; Nonstoichiometry; Dependence; Origin

Optical physics

Optisk fysik

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)