Search results for "Ferroelectric material"

showing 4 items of 4 documents

High resolution x-ray investigation of periodically poled lithium tantalate crystals with short periodicity

2009

Domain engineering technology in lithium tantalate is a well studied approach for nonlinear optical applications. However, for several cases of interest, the realization of short period structures (< 2 ��m) is required, which make their characterization difficult with standard techniques. In this work, we show that high resolution x-ray diffraction is a convenient approach for the characterization of such structures, allowing us to obtain in a nondestructive fashion information such as the average domain period, the domain wall inclination, and the overall structure quality.

DiffractionMaterials scienceFerroelectric materialFOS: Physical sciencesGeneral Physics and AstronomyDielectric polarisationElectric domain wallDomain (software engineering)chemistry.chemical_compoundQuality (physics)OpticsLanthanum compoundCondensed Matter - Materials Sciencebusiness.industryMaterials Science (cond-mat.mtrl-sci)Polarization and depolarization.Characterization (materials science)X-ray diffractionDomain wall (magnetism)chemistryLithium tantalateHysteresiDomain engineeringDomain structurebusinessRealization (systems)Optics (physics.optics)Physics - Optics
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Generazione di Seconda Armonica per Quasi-Phase-Matching Random in Tantalato di Litio con Poling Periodico

2009

We experimentally observed and explained bulk Second Harmonic Generation via Random Quasi-Phase-Matching, derived from a periodically poled Lithium Tantalate sample with a randomly patterned mark-to-space-ratio.

Ferroelectric MaterialsRandom Quasi-Phase-MatchingSecond Harmonic Generation
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First-Order Quasi-Phase-Matched Blue Light Generation in Surface-Poled Ti:Indiffused waveguide

2004

The application of surface periodic poling method for first order quasi-phase-matched (QPM) second harmonic generation (SHG) in Ti:indiffused lithium niobate channel waveguides, was investigated. On a 2.5 μm wide channel waveguide which was periodically poled with a period of 2.47 μm for TM waveguide mode interaction, efficient SHG was observed. The CCD camera was used for monitoring the near-field waveguide mode profiles of both the fundamental and second harmonic waves. The potential of surface domain inversion for efficient nonlinear waveguide interactions was shown after the production of 6 mW of continous-wave blue radiation.

Ferroelectric materialscongruent lithiumLithium
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Influence of uniaxial pressure on dielectric properties of (1- x )Na 0.5 Bi 0.5 TiO 3– x SrTiO 3 for x = 0.01, 0.04, and 0.1 ceramics

2017

The publication costs of this article were covered by the Estonian Academy of Sciences and the University of Tartu.

uniaxial pressureMaterials sciencevisual_artferroelectric materials:NATURAL SCIENCES:Physics [Research Subject Categories]General Engineeringvisual_art.visual_art_mediumDielectricCeramicComposite materialUniaxial pressuredielectric spectroscopyperovskiteProceedings of the Estonian Academy of Sciences
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