Gap levels of Ti3+ on Nb or Li sites in LiNbO3 :(Mg): Ti crystals and their effect on charge transfer processes

DC FieldValueLanguage
dc.contributor.authorCorradi, G
dc.contributor.authorMeyer, M
dc.contributor.authorKovacs, L
dc.contributor.authorPolgar, K
dc.date.accessioned2021-12-23T16:12:55Z-
dc.date.available2021-12-23T16:12:55Z-
dc.date.issued2004
dc.identifier.issn09462171
dc.identifier.urihttps://osnascholar.ub.uni-osnabrueck.de/handle/unios/10325-
dc.description.abstractThe Ti dopant occupying Li or Nb sites and the charge transfer processes induced by thermochemical reduction and optical bleaching treatments have been investigated in LiNbO3 systems using optical absorption and EPR. The Ti3+ centers, built preferentially at Nb sites in heavily Mg-codoped crystals, are shown to have absorption bands at 1.62+/-0.08 eV and 2.65+/-0.25 eV, which are similar or slightly redshifted compared to Ti3+ centers at Li sites in LiNbO3:Ti crystals. The Ti-Nb(4+/3+) gap level plays an important role in the trapping of electron-polarons in LiNbO3, double-doped with Mg and Ti; in particular, an enhanced optical detrapping sensitivity for pumping in the 1.3-2.8 eV range is observed, which may be relevant for applications in integrated optics. Evidence indicating the possible existence of bipolarons involving the Ti dopant is presented.
dc.language.isoen
dc.publisherSPRINGER
dc.relation.ispartofAPPLIED PHYSICS B-LASERS AND OPTICS
dc.subjectABSORPTION
dc.subjectCENTERS
dc.subjectDEFECTS
dc.subjectDOPED LINBO3
dc.subjectLATTICE SITE
dc.subjectLINBO3 SINGLE-CRYSTALS
dc.subjectLITHIUM-NIOBATE
dc.subjectOPTICAL-METHODS
dc.subjectOptics
dc.subjectPhysics
dc.subjectPhysics, Applied
dc.subjectPOLARON
dc.subjectREDUCED UNDOPED LINBO3
dc.titleGap levels of Ti3+ on Nb or Li sites in LiNbO3 :(Mg): Ti crystals and their effect on charge transfer processes
dc.typejournal article
dc.identifier.doi10.1007/s00340-003-1401-6
dc.identifier.isiISI:000220565000014
dc.description.volume78
dc.description.issue5
dc.description.startpage607
dc.description.endpage614
dc.contributor.orcid0000-0001-6388-0496
dc.contributor.researcheridA-9140-2012
dc.identifier.eissn14320649
dc.publisher.place233 SPRING ST, NEW YORK, NY 10013 USA
dcterms.isPartOf.abbreviationAppl. Phys. B-Lasers Opt.
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