by A. Rivera, A. Méndez, G. García, J. Olivares, J. M. Cabrera and F. Agulló-López
Abstract:
A model to account for the defects generated by ion irradiation in the electronic loss regime, and based on non-radiative decay of self-trapped excitons, is discussed and compared to experiments. It takes into account the competing role of the light-emission (radiative) and defect-creation (non-radiative) decay channels. Calculations are applied to LiNbO3, a useful electro-optic crystal, where a large number of relevant experimental data are available. The model explains the strong nonlinear dependence of the defect creation rates as a function of electronic stopping power (thresholding behavior). It also satisfactorily accounts for the formation and growth of amorphous layers by ion-beam irradiation at moderate fluences, φtextgreater1013cm−2. Moreover, it also provides the right trend and reasonable quantitative accordance to data showing the dependence of the track radius on stopping power in single-impact experiments. Finally, the model determines the light emission yield during irradiation. In particular, it predicts that the number of photons emitted by ion impact first increases and then decreases monotonically with increasing electronic stopping power.
Reference:
A. Rivera, A. Méndez, G. García, J. Olivares, J. M. Cabrera and F. Agulló-López, “Ion-beam damage and non-radiative exciton decay in LiNbO3”, Journal of Luminescence, vol. 128, no. 5, pp. 703–707.
Bibtex Entry:
@article{rivera_ion-beam_2008,
series = {Proceedings of the 16th {International} {Conference} on {Dynamical} {Processes} in {Excited} {States} of {Solids}},
title = {Ion-beam damage and non-radiative exciton decay in {LiNbO3}},
volume = {128},
issn = {0022-2313},
url = {http://www.sciencedirect.com/science/article/pii/S0022231307004553},
doi = {10.1016/j.jlumin.2007.12.039},
abstract = {A model to account for the defects generated by ion irradiation in the electronic loss regime, and based on non-radiative decay of self-trapped excitons, is discussed and compared to experiments. It takes into account the competing role of the light-emission (radiative) and defect-creation (non-radiative) decay channels. Calculations are applied to LiNbO3, a useful electro-optic crystal, where a large number of relevant experimental data are available. The model explains the strong nonlinear dependence of the defect creation rates as a function of electronic stopping power (thresholding behavior). It also satisfactorily accounts for the formation and growth of amorphous layers by ion-beam irradiation at moderate fluences, φ{textgreater}1013cm−2. Moreover, it also provides the right trend and reasonable quantitative accordance to data showing the dependence of the track radius on stopping power in single-impact experiments. Finally, the model determines the light emission yield during irradiation. In particular, it predicts that the number of photons emitted by ion impact first increases and then decreases monotonically with increasing electronic stopping power.},
number = {5},
urldate = {2017-10-06},
journal = {Journal of Luminescence},
author = {Rivera, A. and Méndez, A. and García, G. and Olivares, J. and Cabrera, J. M. and Agulló-López, F.},
month = may,
year = {2008},
keywords = {Lithium niobate, Exciton, Ion-beam damage},
pages = {703--707},
file = {ScienceDirect Full Text PDF:E:\cmam_papers\files\938\Rivera et al. - 2008 - Ion-beam damage and non-radiative exciton decay in.pdf:application/pdf;ScienceDirect Full Text PDF:E:\Usuarios\Administrator\Zotero\storage\JHF8C77N\Rivera et al. - 2008 - Ion-beam damage and non-radiative exciton decay in.pdf:application/pdf;ScienceDirect Snapshot:E:\cmam_papers\files\934\S0022231307004553.html:text/html;ScienceDirect Snapshot:E:\Usuarios\Administrator\Zotero\storage\4IPQDED8\S0022231307004553.html:text/html},
}