Ultrafast laser-triggered field ion emission from semiconductor tip

Elena Silaeva 1, 2 Angela Vella 3 N. Sévelin-Radiguet 3 G. Martel 2 B. Deconihout 3 Tatiana Itina 1
1 LHC - Laboratoire Hubert Curien [Saint Etienne]
2 CORIA - Complexe de recherche interprofessionnel en aérothermochimie
3 GPM - Groupe de physique des matériaux
Abstract : We study experimentally and theoretically the controlled field evaporation of single atoms from a semiconductor surface by ultrafast laser-assisted atom probe tomography. The conventional physical mechanisms of field evaporation cannot explain the experimental results recently reported for such materials. A new model is presented in which the positive dc field leads to band bending with a high density of laser-generated holes near the surface of the sample. The laser energy absorption by these holes and the subsequent energy transfer to the lattice considerably increase the tip temperature. We show that this heating plays an important role in the field ion emission process. In addition, experiments are carried out for germanium and silicon tips to check the role of the dc field in the absorption processes, as well as the heating of the tip and the following evaporation. Good agreement between the predictions of our model and the experimental data is found.
Keywords : femtosecond laser atom probe tip semiconductor emission
Type de document :
Article dans une revue
New Journal of Physics, Institute of Physics: Open Access Journals, 2012, 14, pp.113026. 〈10.1088/1367-2630/14/11/113026〉
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https://hal-ujm.archives-ouvertes.fr/ujm-00866869
Contributeur : Tatiana Itina <>
Soumis le : vendredi 27 septembre 2013 - 11:45:04
Dernière modification le : mercredi 25 juillet 2018 - 14:05:31
Document(s) archivé(s) le : samedi 28 décembre 2013 - 04:30:00

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UNIV-ST-ETIENNE | CORIA | LAHC | COMUE-NORMANDIE | GPM | INSA-ROUEN | UNIROUEN | IOGS | PARISTECH

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Elena Silaeva, Angela Vella, N. Sévelin-Radiguet, G. Martel, B. Deconihout, et al.. Ultrafast laser-triggered field ion emission from semiconductor tip. New Journal of Physics, Institute of Physics: Open Access Journals, 2012, 14, pp.113026. 〈10.1088/1367-2630/14/11/113026〉. 〈ujm-00866869〉

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