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Observation of ultra-long lifetime UV-induced infrared absorption in undoped and magnesium-doped congruent lithium niobate crystals
- Source :
-
Applied Surface Science . May2011, Vol. 257 Issue 14, p5957-5960. 4p. - Publication Year :
- 2011
-
Abstract
- Abstract: We report experimental observation of ultra-long lifetime UV-induced absorption in undoped and 5mol.% Mg-doped congruent lithium niobate crystals between 400nm and 2500nm wavelength range. The saturated absorption coefficient change in undoped congruent lithium niobate was about 3 to 7 times that in Mg-doped congruent lithium niobate in the mid-infrared spectrum. The UV-illuminated LiNbO3:Mg was fully recovered in the dark after 2 days, whereas the undoped congruent LiNbO3 still exhibited nontrivial infrared absorption. We attribute the cause of the UV-induced absorption to the creation of hole-trapped intermediate states O− near lithium vacancies. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 01694332
- Volume :
- 257
- Issue :
- 14
- Database :
- Academic Search Index
- Journal :
- Applied Surface Science
- Publication Type :
- Academic Journal
- Accession number :
- 59453962
- Full Text :
- https://doi.org/10.1016/j.apsusc.2011.01.060