Size dependent χ(3) for conduction electrons in Ag nanoparticles

被引：87

作者：

Drachev, VP ^{[1
]}

Buin, AK

Nakotte, H

Shalaev, VM

机构：

[1] Purdue Univ, Sch Elect & Comp Engn, W Lafayette, IN 47907 USA

[2] New Mexico State Univ, Dept Phys, Las Cruces, NM 88003 USA

来源：

NANO LETTERS | 2004年 / 4卷 / 08期

关键词：

D O I：

10.1021/nl049438d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Our theoretical study of the third-order susceptibility (chi((3))) for Ag dielectric composite reveals a critical role of saturation of optical transitions between discrete states of conduction electrons in metal quantum dots. The calculated size dependence of the chi((3)) for Ag nanoparticles reproduces the published experimental results. Saturation effects lead to a decrease of the local field enhancement factor that is of particular importance for surface-enhanced phenomena, such as Raman scattering and nonlinear optical responses.

引用

页码：1535 / 1539

页数：5

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