Surface Plasmons and Nonlocality: A Simple Model

被引：226

作者：

Luo, Yu ^{[1
]}

Fernandez-Dominguez, A. I. ^{[1
]}

Wiener, Aeneas ^{[1
]}

Maier, Stefan A. ^{[1
]}

Pendry, J. B. ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Dept Phys, London SW7 2AZ, England

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 09期

基金：

英国工程与自然科学研究理事会;

关键词：

OPTICAL-PROPERTIES; FIELD ENHANCEMENT; NANOWIRE DIMERS; QUANTUM; PERFORMANCE; EXTINCTION; RESONANCES;

D O I：

10.1103/PhysRevLett.111.093901

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Surface plasmons on metals can concentrate light into subnanometric volumes and on these near atomic length scales the electronic response at the metal interface is smeared out over a Thomas-Fermi screening length. This nonlocality is a barrier to a good understanding of atomic scale response to light and complicates the practical matter of computing the fields. In this Letter, we present a local analogue model and show that spatial nonlocality can be represented by replacing the nonlocal metal with a composite material, comprising a thin dielectric layer on top of a local metal. This method not only makes possible the quantitative analysis of nonlocal effects in complex plasmonic phenomena with unprecedented simplicity and physical insight, but also offers great practical advantages in their numerical treatment.

引用

页数：5

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