Chiral coupling in gold nanodimers

被引：40

作者：

Husu, H. ^{[1
]}

Canfield, B. K. ^{[1
]}

Laukkanen, J.

Bai, B. ^{[2
]}

Kuittinen, M. ^{[2
]}

Turunen, J. ^{[2
]}

Kauranen, M. ^{[1
]}

机构：

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

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

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 18期

基金：

芬兰科学院;

关键词：

chiral symmetries; gold; light polarisation; nanostructured materials; optical harmonic generation;

D O I：

10.1063/1.3021017

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Second-harmonic generation from T-shaped gold nanodimers with nanogaps has different efficiencies for left- and right-hand circularly polarized fundamental light. The difference arises from the chiral symmetry breaking of the dimers due to nonorthogonal mutual orientations of the horizontal and vertical bars of the T shape and depends on the gap size. Unexpectedly, the smallest gap with presumably the strongest coupling gives rise to only a small difference. All results can be explained by considering the distribution of the polarized local field in the structure.

引用

页数：3

共 17 条

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