多光子等离子体激元激发的形式
Formalism for Multiphoton Plasmon Excitation in Jellium Clusters
摘要：
我们提出了一种新的形式主义描述的多光子等离子体激元激发过程中的jeletion团簇。通过使用我们的方法，我们表明，除了偶极等离子体激元激发，多极等离子体激元（四极，八极等）可以激发在一个集群中的多光子吸收过程，这导致在一个显着的差异之间的等离子体激元共振轮廓的截面多光子吸收相比。我们计算了多光子吸收的截面，并分析了表面和体积等离子体对多极等离子体的贡献之间的平衡。
英文摘要：
We present a new formalism for the description of multiphoton plasmon excitation processes in jellium clusters. By using our method, we demonstrate that, in addition to dipole plasmon excitations, the multipole plasmons (quadrupole, octupole, etc) can be excited in a cluster by multiphoton absorption processes, which results in a significant difference between plasmon resonance profiles in the cross sections for multiphoton as compared to single-photon absorption. We calculate the cross sections for multiphoton absorption and analyse the balance between the surface and volume plasmon contributions to multipole plasmons.
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