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Double-peak droplet mass distribution observed during sub-ps laser ablation of Si targets

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Abstract

The angular distribution of the ablated material was studied during sub-ps Si laser ablation deposition using a special hemicylindrical substrate holder and different laser fluences ranging between 0.4 and 1.7 J/cm2. Scanning electron microscopy analysis of the deposited films showed that, independent of the fluence, the distribution of the deposited droplets presents two maxima. The first maximum corresponds to the average plume deflection angle value due to the local surface orientation produced by the preferential etching process. The second maximum is observed approximately at 45° with respect to the normal of the target surface, and is related to the phase explosion products that expand along the incident laser beam direction. The investigation of the twofold distribution of the sub-μm size deposited droplets is important to improve the quality of the deposited coatings.

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Authors and Affiliations

  1. National Laboratories of Frascati, INFN, via E. Fermi 40, 00044, Frascati, Italy

    L. Cultrera

  2. Physics Department and INFN, University of Salento, Via Arnesano, 73100, Lecce, Italy

    A. Dima & A. Perrone

  3. c/o Dipartimento di Ingegneria dell’Innovazione, NNL, National Nanotechnology Laboratory of Istituto Nazionale di Fisica della Materia (INFM), Via Arnesano, 73100, Lecce, Italy

    D. Pisignano & R. Cingolani

  4. Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology – Hellas (FORTH), P.O. Box 1527, Heraklion, 71110, Crete, Greece

    A. Klini

Authors
  1. L. Cultrera
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  2. A. Dima
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  3. A. Perrone
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  4. D. Pisignano
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  5. R. Cingolani
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  6. A. Klini
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Correspondence to L. Cultrera.

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PACS

81.15.Fg; 68.55.Jk; 79.20.Ds

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Cultrera, L., Dima, A., Perrone, A. et al. Double-peak droplet mass distribution observed during sub-ps laser ablation of Si targets. Appl. Phys. A 88, 435–438 (2007). https://doi.org/10.1007/s00339-007-4010-0

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  • DOI: https://doi.org/10.1007/s00339-007-4010-0

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