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Issue 5, 2016
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Ablation dynamics of Co/ZnS targets under double pulse femtosecond laser irradiation

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Abstract

Femtosecond lasers, used as tools to investigate the ablation dynamics of solids, can help to develop strategies to control the deposition of nanomaterials by pulsed laser ablation. In this work, Co/ZnS targets, potential candidates for the synthesis of diluted magnetic semiconductor materials, are irradiated by sequences of two femtosecond laser pulses delayed in the picosecond time scale. The ionic composition of the ablation plasma and the dependence of the ion signals on the interpulse delay and relative fluence are determined by time-of-flight mass spectrometry. The results show that, when pulses of different fluence are used, highly asymmetric ion yields are obtained, with more intense ion signals detected when the lower fluence pulse is temporally ahead. The comparison between asymmetric and equal fluence double pulse ablation dynamics provides some understanding of the different processes that modify the properties of the layer irradiated by the first pulse and of the mechanisms affecting the coupling of the delayed pulse into the material. The final outcome of the double pulse irradiation is characterized through the analysis of the deposits produced upon ablation.

Graphical abstract: Ablation dynamics of Co/ZnS targets under double pulse femtosecond laser irradiation

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Publication details

The article was received on 04 Sep 2015, accepted on 04 Jan 2016 and first published on 04 Jan 2016


Article type: Paper
DOI: 10.1039/C5CP05290D
Citation: Phys. Chem. Chem. Phys., 2016,18, 3522-3529
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    Ablation dynamics of Co/ZnS targets under double pulse femtosecond laser irradiation

    I. Lopez-Quintas, V. Loriot, D. Ávila, J. G. Izquierdo, E. Rebollar, L. Bañares, M. Castillejo, R. de Nalda and M. Martin, Phys. Chem. Chem. Phys., 2016, 18, 3522
    DOI: 10.1039/C5CP05290D

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