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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Excimer laser absorption by metallic nano-particles embedded in silica
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Excimer laser absorption by metallic nano-particles embedded in silica

机译：嵌入二氧化硅中的金属纳米粒子吸收准分子激光

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摘要

Metallic nano-particles embedded in silicon dioxide have optical properties that are of interest for their possible technological applications in the near future. These properties have been found to depend on their size and shape as well as on their surroundings. In this paper we investigate the effect of 308 nm excimer laser irradiation on silver and gold nano-particles embedded in high quality synthetic silica produced by 2MeV ion-beam implantation followed by a thermal annealing. Laser irradiation induces nano-particle dissolution and diffusion to the surface and eventually loss of the metal accompanied by ablation of the surface. We show by numerical solution of the heat conduction equation that the process can be understood by considering that the nano-particles are responsible for the laser absorption and that nano-particles dissolution, and subsequent diffusion to the surface, take place when the nano-particles melting temperature is reached.
机译：包埋在二氧化硅中的金属纳米粒子具有光学特性，这些光学特性对其在不久的将来可能的技术应用感兴趣。已经发现这些性质取决于它们的尺寸和形状以及它们的周围环境。在本文中，我们研究了308 nm受激准分子激光辐照对嵌入2MeV离子束注入并随后进行热退火生产的高质量合成二氧化硅中的银和金纳米粒子的影响。激光辐照诱导纳米颗粒溶解并扩散到表面，并最终导致金属损失并伴随表面烧蚀。我们通过热传导方程的数值解表明，可以通过考虑纳米颗粒对激光的吸收负责，并且当纳米颗粒发生时，纳米颗粒溶解并随后扩散到表面来理解该过程。达到熔化温度。

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