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Pulse-induced transient blue absorption relatedwith long-lived excitonic states in iron-dopedlithium niobate

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https://osnadocs.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-201907171850
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dc.creatorMesserschmidt, Simon-
dc.creatorBourdon, Bjoern-
dc.creatorBrinkmann, David-
dc.creatorKrampf, Andreas-
dc.creatorVittadello, Laura-
dc.creatorImlau, Mirco-
dc.date.accessioned2019-07-17T15:45:03Z-
dc.date.available2019-07-17T15:45:03Z-
dc.date.issued2019-06-03-
dc.identifier.citationOptical Materials Express Vol. 9, Issue 7, pp. 2748-2760, 2019ger
dc.identifier.urihttps://osnadocs.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-201907171850-
dc.description.abstractTransient absorption is studied in Fe-doped lithium niobate single crystals with the goal to control and probe a blue absorption feature related with excitonic states bound to FeLi defect centers. The exciton absorption is deduced from the comparison of ns-pump, supercontinuum-probe spectra obtained in crystals with different Fe-concentration and Fe2+/3+Li-ratio, at different pulse peak and photon energies as well as by signal separation taking well-known small polaron absorption bands into account. As a result, a broad-band absorption feature is deduced being characterized by an absorption cross-section of up to max(2.85 eV)=(4±2)⋅10−22 m2. The band peaks at about 2.85 eV and can be reconstructed by the sum of two Gaussians centered at 2.2 eV (width ≈0.5 eV) and 2.9 eV (width ≈0.4 eV), respectively. The appropriate build-up and decay properties strongly depend on the crystals’ composition as well as the incident pulse parameters. All findings are comprehensively analyzed and discussed within the model of Fe2+Li−O−−VLi excitonic states.eng
dc.relationhttps://www.osapublishing.org/ome/abstract.cfm?uri=ome-9-7-2748ger
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectTransient absorptioneng
dc.subjectlong-lived excitonic stateseng
dc.subject.ddc530 - Physikger
dc.titlePulse-induced transient blue absorption relatedwith long-lived excitonic states in iron-dopedlithium niobateeng
dc.typeEinzelbeitrag in einer wissenschaftlichen Zeitschrift [article]ger
orcid.creatorhttps://orcid.org/0000-0002-5343-5636-
orcid.creatorhttps://orcid.org/0000-0002-4559-4522-
orcid.creatorhttps://orcid.org/0000-0001-6193-7487-
dc.identifier.doi10.1364/OME.9.002748-
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