Abstract
Strong light-induced absorption has been observed in lithium niobate crystals doped with magnesium after application of femtosecond illumination. In this material there are no Nb-on-Li-site defects and hence no antisite polarons occur, but small free polarons close to the conduction band can be generated. The light-induced absorption observed is attributed to these polarons. For LiNbO3:Mg, their decay times are about two orders of magnitude smaller than those of the Nb-on-Li-site polarons in undoped material. The results are relevant for a better understanding of the suppression of the so-called optical damage in these crystals and for their use in femtosecond applications.
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Open Access This is an open access article distributed under the terms of the Creative Commons Attribution Noncommercial License (https://creativecommons.org/licenses/by-nc/2.0), which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
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Maxein, D., Kratz, S., Reckenthaeler, P. et al. Polarons in magnesium-doped lithium niobate crystals induced by femtosecond light pulses. Appl. Phys. B 92, 543–547 (2008). https://doi.org/10.1007/s00340-008-3103-6
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DOI: https://doi.org/10.1007/s00340-008-3103-6