Investigation of electric internal field in congruent LiNbO3 by electro-optic effect
Authors: Paturzo M., Alfieri D., Grilli S., Ferraro P., De Natale P., De Angelis M., De Nicola S., Finizio A., Pierattini G.
Autors Affiliation: Istituto Nazionale di Ottica Applicata, Sez. di Napoli, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy;
Istituto di Cibernetica del CNR, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy
Abstract: 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. (C) 2004 American Institute of Physics.
Journal/Review: APPLIED PHYSICS LETTERS
Volume: 85 (23) Pages from: 5652 to: 5654
KeyWords: Annealing; Crystalline materials; Electric field effects; Electrooptical effects; Ferroelectricity; Holograms; Interferometry; Optical materials; Refractive index; Tensors, Electrical poling; Ferroelectric polarization; Hysteresis loops; Phase retardation, Lithium niobateDOI: 10.1063/1.1832738Citations: 20data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2020-11-22References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here