Short-pulse light excitation of LiNbO3 : Hopping versus coherent band transport analysis

J. Carnicero; M. Carrascosa; F. Agulló-López; G. García

doi:10.1364/PEMD.2005.457

Photorefractive Effects, Materials, and Devices
OSA Trends in Optics and Photonics (Optica Publishing Group, 2005),
paper 457
•https://doi.org/10.1364/PEMD.2005.457

Short-pulse light excitation of LiNbO₃ : Hopping versus coherent band transport analysis

J. Carnicero, M. Carrascosa, F. Agulló-López, and G. García

Photorefractive Effects, Materials, and Devices 2005

Sanya, Hainan China
ISBN: 1-55752-793-8

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J. Carnicero, M. Carrascosa, F. Agulló-López, and G. García, "Short-pulse light excitation of LiNbO3 : Hopping versus coherent band transport analysis," in Photorefractive Effects, Materials, and Devices, G. Zhang, D. Kip, D. Nolte, and J. Xu, eds., Vol. 99 of OSA Trends in Optics and Photonics (Optica Publishing Group, 2005), paper 457.

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Abstract

The dynamics of electronic carriers after a light excitation pulse in Fe-doped LiNbO₃ crystals is discussed under two alternative theoretical schemes. One considers thermally-activated diffusive transport of electrons (hopping) and uses a MonteCarlo approach. Simulations of the temporal evolution of the small polarons (Nb⁺⁴/Nb⁺⁵) and iron-impurity (Fe⁺²/Fe⁺³) centers during and after the light pulse has been obtained for different light intensities and antisite concentrations. On the other hand, the kinetics has been also described by using a standard two-center model and coherent band transport. The results of the two approaches have been compared on the light of the available experimental data.

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