Negative permittivity and permeability of gold square nanospirals

被引：16

作者：

Abdeddaim, R. ^{[1
]}

Guida, G. ^{[1
]}

Priou, A. ^{[1
]}

Gallas, B. ^{[2
]}

Rivory, J. ^{[2
]}

机构：

[1] Univ Paris Ouest Def Nanterre, Grp Electromagnetisme Appl, F-92410 Ville Davray, France

[2] Univ Paris 06, CNRS, Inst NanoSci Paris, F-75015 Paris, France

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 08期

关键词：

gold; magnetic resonance; nanostructured materials; permeability; permittivity; plasmonics; surface plasmon resonance; SPLIT-RING-RESONATORS; INDEX METAMATERIAL; FREQUENCIES; RESONANCES;

D O I：

10.1063/1.3086873

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The optical properties of square nanospirals made of gold have been investigated numerically in the hundred terahertz range as a function of the geometrical parameters of the nanospirals. It is shown that the permittivity values of the nanospirals originate from the longitudinal surface plasmon resonances of the arms composing the nanospirals. A magnetic resonance was also observed whose magnitude and position increased with the number of winding. Above three windings the gold nanospirals exhibited negative values of the real part of the permeability above 400 THz.

引用

页数：3

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