Intensity-driven, laser induced transformation of Ag nanospheres to anisotropic shapes

Intensity-driven, laser induced transformation of Ag nanospheres to anisotropic shapes
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强度驱动、激光诱导银纳米球向各向异性形状的转变

DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
H. Graener
H. Graener
中科院分区：
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文献类型：
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作者：
A. Stalmashonak;A. Podlipensky;G. Seifert;H. Graener

文献摘要

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在激光照射下，钠钙玻璃中初始球形银纳米粒子的形状发生了持续的变化。在线偏振脉冲下，纳米颗粒的这种形状转变导致了材料的光学二色性。全面研究了这种效应的强度依赖性，解决了永久修饰的整个强度范围以及施加在样品上一个点上的激光脉冲数的影响。这些结果是建立导致激光诱导玻璃中金属纳米颗粒形状转变的可能机制的完整场景的基础。
The shapes of initially spherical Ag nanoparticles in soda-lime glass are persistently changed using fs laser irradiation. With linearly polarized pulses, this shape transformation of the nanoparticles causes optical dichroism of the material. The intensity dependence of this effect is studied comprehensively, addressing the whole intensity range of permanent modifications as well as the influence of the number of laser pulses applied to one spot on the sample. The results are used as basis to develop a complete scenario of the possible mechanisms leading to the laser-induced shape transformation of metallic nanoparticles in glass.