| Autor: |
G. García, M. Carrascosa, F. Agulló-López, J. Carnicero |
| Rok vydání: |
2005 |
| Předmět: |
|
| Zdroj: |
Photorefractive Effects, Materials, and Devices. |
| DOI: |
10.1364/pemd.2005.457 |
| Popis: |
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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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