0000000000728850

AUTHOR

I. Pracka

showing 2 related works from this author

The role of Fe and Cu dopants in electron–hole trapping and relaxation process in congruent LiNbO3

2003

Abstract The transient optical absorption and kinetics of absorption decay is studied in undoped, Fe doped, and Cu doped LiNbO 3 crystals irradiated by pulsed electron beam. The 1.6 eV band of electron polaron trapped at antisite niobium was observed in all crystal samples. The nature of centers responsible for transient absorption is discussed. Electron polarons are shown to be less stable in LiNbO 3 :Fe compared with LiNbO 3 :Cu and undoped LiNbO 3 . It is suggested that a major part of electrons and holes created by irradiation are trapped in the vicinity of dopants.

Absorption spectroscopyCondensed matter physicsDopantChemistryOrganic ChemistryElectron holeElectronPolaronAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsInorganic ChemistryCrystalElectron beam processingElectrical and Electronic EngineeringPhysical and Theoretical ChemistryAbsorption (electromagnetic radiation)SpectroscopyOptical Materials
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Transient and stable color centers in pure and Cu-doped LiNbO3

2003

The present work is devoted to investigation of stable and transient color centers that are induced by radiation and temperature in pure and Cu-doped LiNbO 3 single crystals. The transient changes of absorption of the crystals induced by pulsed electron beam (E=0.25 MeV) are studied in 0-5000 ns time range, as well as stable changes of absorption induced by reducing annealing and irradiation with γ-quanta, high energy electrons or fast reactor neutrons.

Annealing (metallurgy)Chemistrybusiness.industryDopingAnalytical chemistryGeneral ChemistryElectronRadiationCondensed Matter PhysicsFerroelectricityOpticsUltrafast laser spectroscopyCathode rayGeneral Materials ScienceIrradiationbusinessCrystal Research and Technology
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