Multipolar analysis of second-harmonic radiation from gold nanoparticles

被引：58

作者：

Kujala, Sami ^{[1
]}

Canfield, Brian K. ^{[1
]}

Kauranen, Martti ^{[1
]}

Svirko, Yuri ^{[2
]}

Turunen, Jari ^{[2
]}

机构：

[1] Tampere Univ Technol, Inst Phys, Opt Lab, FI-33101 Tampere, Finland

[2] Univ Joensuu, Dept Math & Phys, FI-80101 Joensuu, Finland

来源：

OPTICS EXPRESS | 2008年 / 16卷 / 22期

基金：

芬兰科学院;

关键词：

D O I：

10.1364/OE.16.017196

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a multipolar tensor analysis of second-harmonic radiation from arrays of noncentrosymmetric L-shaped gold nanoparticles. Our approach is based on the fundamental differences in the radiative properties of electric dipoles and higher multipoles, which give rise to differences in the nonlinear response tensors for the reflected and transmitted second-harmonic signals. The results are analyzed by dividing the tensors into symmetric (dipolar) and antisymmetric (higher multipolar) parts between the two directions. The nonlinear response is found to be dominated by a tensor component, not resolved earlier [Kujala et. al, Phys. Rev. Lett. 98, 167403, ( 2007)], which is associated with chiral symmetry breaking of the sample and which also contains a strong multipolar contribution. The results are explained by a phenomenological model where asymmetrically-distributed defects on opposite sides of the particles give rise to dipolar and quadrupolar second-harmonic emission. (C) 2008 Optical Society of America

引用

页码：17196 / 17208

页数：13

共 57 条

[11] Amacroscopic formalism to describe the second-order nonlinear optical response of nanostructures [J].