Influence of Mg doping on the behaviour of polaronic light-induced absorption in LiNbO3

Autor(en): Conradi, D.
Merschjann, C.
Schoke, B.
Imlau, M. 
Corradi, G.
Polgar, K.
Stichwörter: DEFECTS; DOPED LINBO3; LITHIUM-NIOBATE CRYSTALS; Materials Science; Materials Science, Multidisciplinary; Physics; Physics, Applied; Physics, Condensed Matter; TIME
Erscheinungsdatum: 2008
Herausgeber: WILEY-BLACKWELL
Journal: PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
Volumen: 2
Ausgabe: 6
Startseite: 284
Seitenende: 286
Zusammenfassung: 
Transient light-induced absorption changes alpha(li)(t), caused by optically generated small polarons, are investigated in LiNbO3:Mg below and above the optical-damage-resistance threshold (ODRT). The lifetime of alpha(li)(t) is reduced by three orders of magnitude above the ODRT while a significantly enhanced amplitude alpha(max)(li) is observed in the infrared. Our observations are in full accordance with the predictions of microscopic models for the ODRT, namely the removal of Nb-Li antisite defects upon incorporation of Mg ions, and an enhanced dark conductivity.
ISSN: 18626254
DOI: 10.1002/pssr.200802176

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