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Laser-printed hemispherical silicon Mie resonators

机译:激光印刷半球形硅MIE谐振器

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摘要

Subwavelength nanostructures made of high-index low-loss materials have revolutionized the fields of linear and nonlinear nanophotonics, stimulating growing demands for efficient and inexpensive fabrication technologies. Here, we demonstrate high-precision and reproducible printing of hemispherical Si nanoparticles (NPs) via controllable dewetting of glass-supported a-Si films driven by a single femtosecond laser pulse. The diameter of the formed nanocrystalline NPs can be fully controlled by initial alpha-Si film thickness as well as lateral size of the laser spot and can be predicted by a simple empirical model based on conservation of energy and mass. A resonant optical response associated with Mie-type resonances supported by hemispherical NPs was confirmed by combining numerical modeling with optical microspectroscopy. Inexpensive and high-performing direct laser printing of nanocrystalline Si Mie resonators with a user-defined arrangement opens a pathway for various applications in optical sensing and. nonlinear nanophotonics. (C) 2021 Optical Society of America
机译:由高折射率低损耗材料制成的亚波长纳米结构已经彻底改变了线性和非线性纳米光子学领域,刺激了对高效廉价制造技术的需求。在这里,我们展示了通过单个飞秒激光脉冲驱动的玻璃支撑非晶硅薄膜的可控去湿,高精度且可重复打印半球形硅纳米颗粒(NPs)。形成的纳米晶纳米颗粒的直径可以完全由初始α-Si膜厚度以及激光光斑的横向尺寸控制,并且可以通过基于能量和质量守恒的简单经验模型进行预测。通过将数值模拟与光学显微光谱相结合,证实了半球形NPs支持的Mie型共振相关的共振光学响应。纳米晶Si-Mie谐振器的廉价和高性能直接激光打印(具有用户定义的排列)为光学传感和成像领域的各种应用开辟了道路。非线性纳米光子学。(2021)美国光学学会

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  • 来源
    《Optics Letters》 |2021年第10期|共4页
  • 作者单位

    Inst Automat &

    Control Proc FEB RAS 5 Radio Str Vladivostok 690041 Russia;

    Inst Automat &

    Control Proc FEB RAS 5 Radio Str Vladivostok 690041 Russia;

    Ruhr Univ Bochum Univ Str 150 D-44801 Bochum Germany;

    Inst Automat &

    Control Proc FEB RAS 5 Radio 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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