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Zero-orbital-angular-momentum laser printing of chiral nanoneedles

机译:零轨道角动量激光印刷手性纳尼

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摘要

Laser irradiation of various materials including metals, polymers, and semiconductors with vortex beams was previously shown to "twist" transiently molten matter providing the direct easy-to-implement way to obtain chiral surface relief. Specifically for metals, this effect was attributed to transfer of an orbital angular momentum (OAM) carried by a vortex beam. In this Letter, we report the formation of twisted metallic nanoneedles on surfaces of silver and gold films under their irradiation by a zero-OAM laser beam with a spiral-shaped intensity distribution. Our comparative experiments clearly demonstrate, for the first time to the best of our knowledge, that the formation of the chiral nanoneedles on the noble-metal films is mainly governed by the temperature-gradient-induced chiral thermocapillary mass transfer, rather than by OAM-driven rotation of the molten matter. (C) 2017 Optical Society of America
机译:先前示出了包括金属,聚合物和具有涡旋束的半导体的各种材料的激光照射,以“扭曲”瞬时熔融,提供直接易于实施的方式以获得手性表面浮雕。 专门用于金属,这种效果归因于涡流束携带的轨道角动量(OAM)的转移。 在这封信中,我们在通过螺旋形强度分布的零奥姆激光束照射下,在银和金薄膜表面上形成扭曲金属纳尼的形成。 我们的比较实验清楚地证明,这是我们首次展示了我们的知识,即贵金属薄膜上的手性纳尼的形成主要由温度梯度诱导的手性热量传递,而不是奥姆 - 的 熔融物 被驱动旋转 。 (c)2017年光学学会

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  • 来源
    《Optics Letters》 |2017年第23期|共4页
  • 作者单位

    Far Eastern Fed Univ Sch Nat Sci 6 Sukhanova Str Vladivostok 690041 Russia;

    Samara Natl Res Univ Moskovskoe Shosse 34 Samara 443086 Russia;

    RAS Inst Automat &

    Control Proc FEB 5 Radio Str Vladivostok 690041 Russia;

    RAS Inst Automat &

    Control Proc FEB 5 Radio Str Vladivostok 690041 Russia;

    RAS Inst Automat &

    Control Proc FEB 5 Radio Str Vladivostok 690041 Russia;

    Samara Natl Res Univ Moskovskoe Shosse 34 Samara 443086 Russia;

    Samara Natl Res Univ Moskovskoe Shosse 34 Samara 443086 Russia;

    Far Eastern Fed Univ Sch Nat Sci 6 Sukhanova Str Vladivostok 690041 Russia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 计量学;光学;
  • 关键词

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