Search results for "parametric generation"

showing 3 items of 3 documents

Spatial Simultons in 2D Photonic Crystals of Nonlinear Origin

2007

We observed for the very first time quadratic spatial solitons (simultons) in a two dimensional photonic lattice defined by periodic sign inversion of its susceptibilty. This is the first demonstration of quadratic self-confinement in a 2D purely nonlinear photonic crystal.

Ferroelectric Crystals Nonlinear Optics Spatial solitons Lithium Niobate Cascading Parametric Generation
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Parametric conversion in micrometer and sub-micrometer structured ferroelectric crystals by surface poling

2012

We report on recent technological improvements concerning nonlinear patterning of lithium niobate and lithium tantalate in the micrometer and submicrometer scales using surface periodic poling for ferroelectric domain inversion. The fabricated samples were employed for frequency doubling via quasiphase-matching both in bulk and guided wave geometries, including forward and backward configurations and wavelength conversion in bands C and L. We also investigated short-period quasiperiodic samples with randomly distributed mark-to-space ratios.

Materials scienceSurface PolingLithium niobatePhysics::OpticsSettore ING-INF/01 - ElettronicaFerroelectric Crystalchemistry.chemical_compoundOpticsPeriodic polinglcsh:QC350-467Parametric ConversionupconversionGuided wave testingbusiness.industryPolingparametric generationferroelectricsSettore ING-INF/02 - Campi ElettromagneticiFerroelectricityAtomic and Molecular Physics and OpticsPhoton upconversionElectronic Optical and Magnetic MaterialschemistryQuasiperiodic functionLithium tantalatebusinesslcsh:Optics. Light
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Nanopatterned ferroelectric crystals for parametric generation

2006

We report on recent results by surface periodic poling on lithium niobate and lithium tantalate. Such approach allows periodic inversion of the second order susceptibility with nanoscale features using insulating masks. We achieved a world-best 200 nm feature size, as well as good compatibility with alpha-phase proton exchanged channel waveguides in lithium niobate. Preliminary results of surface periodic poling in lithium tantalate also show similar characteristics. Surface poling is best suited for integrated optics devices in technologically-demanding configurations such as backward second harmonic generation and counter propagating optical parametric amplification

Nonlinear integrated opticsOptical frequency multiplierMaterials sciencebusiness.industryParametric generationPolingLithium niobateSecond-harmonic generationPhysics::OpticsLithium tantalateSurface periodic polingLithium niobateFerroelectricityOptical parametric amplifierchemistry.chemical_compoundOpticschemistryPeriodic polingLithium tantalatebusiness
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