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首页> 外文期刊>Journal of photochemistry and photobiology, C. Photochemistry reviews >The simplest plasmonic molecules: Metal nanoparticle dimers and trimers
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The simplest plasmonic molecules: Metal nanoparticle dimers and trimers

机译:最简单的等离子体分子:金属纳米粒子二聚体和三聚体

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This review discusses research on the plasmonic properties of small clusters of metal nanoparticles, with two and three particles. These are the simplest examples of 'plasmonic molecules'. Coupling between two particles leads to new surface plasmon resonances and to the creation of a hot spot of a strong electric field in the gap between the particles. Such a hot spot can be used to enhance Raman scattering or fluorescence, making plasmonic dimers useful for applications in spectroscopy and sensing. Trimers offer a richer spectrum of options for coupling between particles, which can be analyzed using group theory to obtain the plasmonic modes, in analogy to vibrational modes. Symmetry plays an important role in our understanding of the physics of plasmonic dimers and trimers, and new physical phenomena may appear when the symmetry of a dimer or a trimer is broken, including directional emission, Fano resonances, plane chirality and more. The review introduces some of these concepts, the basic physics behind them and their possible applications. Focus Point sections describing selected outstanding recent developments accompany the review. (C) 2014 Elsevier B.V. All rights reserved.
机译:这篇综述讨论了具有两个和三个粒子的金属纳米粒子的小簇的等离子体性质的研究。这些是“等离子体分子”的最简单例子。两个粒子之间的耦合导致新的表面等离子体共振,并在粒子之间的间隙中产生强电场的热点。这样的热点可用于增强拉曼散射或荧光,使等离激元二聚体可用于光谱学和传感领域。三聚体为颗粒之间的偶联提供了更丰富的选择范围,可以类似于振动模式,使用群论对其进行分析以获得等离子体模式。对称性在我们理解等离激元二聚体和三聚体的物理过程中起着重要作用,当二聚体或三聚体的对称性被破坏时,可能会出现新的物理现象,包括定向发射,Fano共振,平面手性等。这篇综述介绍了其中一些概念,它们背后的基本物理原理及其可能的应用。重点部分介绍了近期精选的杰出发展。 (C)2014 Elsevier B.V.保留所有权利。

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