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Reassembling Solid Materials by Femtosecond Laser Ablation: Case of Aluminum Nitride

机译:飞秒激光烧蚀重新组装固体材料:氮化铝的情况

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摘要

Through atomization and ionization, we could completely alter the composition of a nonconductive material, aluminum nitride, by femtosecond laser ablation. Preferential production of pure aluminum cluster cations Al_n~+ (n ≤ 32) reflects not only their higher energetic stability compared with mixed clusters Al_nN_m~+ but also completion of thermal relaxation in ablation plasma. Observation of metastable dissociation of Al_n~+ indicates that cluster cations have still enough internal energy for dissociation to occur, although the process is much slower than the cluster formation. Almost no cluster formation has been observed after nanosecond laser ablation of aluminum nitride, which highlights the distinct nature of ablation plasma produced by femtosecond laser ablation.
机译:通过雾化和电离,我们可以通过飞秒激光烧蚀完全改变非导电材料氮化铝的成分。优先生产纯铝簇阳离子Al_n〜+(n≤32),不仅反映了它们比混合簇Al_nN_m〜+更高的能量稳定性,而且还反映了烧蚀等离子体中热弛豫的完成。对Al_n〜+亚稳解离的观察表明,簇阳离子仍具有足够的内部能发生解离,尽管该过程比簇的形成要慢得多。纳秒激光烧蚀氮化铝后几乎没有观察到团簇形成,这突出了飞秒激光烧蚀产生的烧蚀等离子体的独特性质。

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  • 来源
    《_Applied Physics Express》 |2013年第6期|066301.1-066301.4|共4页
  • 作者

    Tohru Kobayashi; Yukari Matsuo;

  • 作者单位

    RIKEN Advanced Science Institute, Wako, Saitama 351-0198, Japan;

    RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan;

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  • 正文语种 eng
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