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首页> 外文会议>Proceedings vol.2004-13; International Symposium on Nanoscale Devices, Materials, and Biological Systems: Fundamentals and Applications; ; >Harmonic Generation in Metallic Nanoscale Systems
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Harmonic Generation in Metallic Nanoscale Systems

机译：金属纳米级系统中的谐波产生

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摘要

The nonlinear interaction between materials based on metallic nanoparticles and strong electric fields such as the one produced by laser pulsed radiation produces significant response amplification whenever system resonances are being excited. In particular, second harmonic radiation excited by pulsed lasers in the near infrared can be generated in these systems with efficiencies far exceeding those of corresponding bulk materials. In this paper, experimental results are presented for two different physical systems, namely Au nanoparticles in aqueous solutions and Ga nanoparticle monolayers embedded in dielectric matrices with mean radii in the nanometer range. Measurements of second harmonic generated radiation in the two systems in different geometries and their dependence on various physical parameters illustrate the central role of surface plasmon resonances. This experimental evidence is reasonably corroborated by ad hoc models.
机译：每当激发系统共振时，基于金属纳米粒子的材料与强电场（例如由激光脉冲辐射产生的电场）之间的非线性相互作用都会产生显着的响应放大。特别地，在这些系统中可以产生由近红外的脉冲激光激发的二次谐波辐射，其效率远远超过相应的散装材料。本文介绍了两种不同物理系统的实验结果，即水溶液中的Au纳米颗粒和嵌入在平均半径在纳米范围内的介电基质中的Ga纳米颗粒单层。在两个系统中不同几何形状的二次谐波产生辐射的测量及其对各种物理参数的依赖性说明了表面等离子体激元共振的中心作用。临时模型可以合理地证实这一实验证据。

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