6533b82efe1ef96bd12926a6

RESEARCH PRODUCT

MICRO- AND NANO-STRUCTURES OF NOMINALLY PURE STOICHIOMETRIC LITHIUM NIOBATE SINGLE CRYSTAL IN RAMAN SPECTRA

P. G. ChufyrevM. N. PalatnikovB. N. MavrinA. A. YanichevK. BormanisN. V. Sidorov

subject

Materials scienceLithium niobatePhysics::OpticsMolecular physicslaw.inventionCrystalchemistry.chemical_compoundsymbols.namesakeOpticslawMaterials ChemistryPhysics::Atomic PhysicsIrradiationElectrical and Electronic Engineeringbusiness.industryFar-infrared laserCondensed Matter PhysicsLaserFerroelectricityElectronic Optical and Magnetic MaterialschemistryControl and Systems EngineeringCeramics and CompositessymbolsbusinessRaman spectroscopySingle crystal

description

ABSTRACT The authors show that bandwidths in Raman spectra of ferroelectric photo-refractive single crystals may depend on wavelength of laser radiation exciting the spectrum. Raman bands of lithium niobate single crystals are broader if the spectrum is excited by laser radiation in visible as compared with the spectrum excited by infrared laser radiation. Local microscopic structural heterogeneities of altered index of refraction are shown to appear in parts of the crystal under laser irradiation. Under visible radiation the structural heterogeneities provide additional contribution to broadening of Raman bands. Similar microscopic heterogeneities are practically absent at laser irradiation in near-infra-red.

yearjournalcountryeditionlanguage
2009-11-25Integrated Ferroelectrics
https://doi.org/10.1080/10584580903432460