Superenhanced backscattering of light by nanoparticles

被引：49

作者：

Chen, ZG ^{[1
]}

Taflove, A

Li, X

Backman, V

机构：

[1] Northwestern Univ, Dept Elect & Comp Engn, Evanston, IL 60208 USA

[2] Northwestern Univ, Dept Biomed Engn, Evanston, IL 60208 USA

来源：

OPTICS LETTERS | 2006年 / 31卷 / 02期

关键词：

D O I：

10.1364/OL.31.000196

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report a physical explanation for the phenomenon wherein the backscattering of light by dielectric particles of sizes between 100 and 1 nm is enhanced by 7-11 orders of magnitude. The phenomenon involves complex composite interactions between a dielectric microsphere and a nanoparticle positioned in close proximity to the microsphere. We provide both analytical and perturbation analyses that show that the enhanced backscattering intensity of a nanoparticle is proportional to the third power of its size parameter. Potential applications of this phenomenon include visible-light detection, characterization, and manipulation of particles as small as a few nanometers. (c) 2006 Optical Society of America.

引用

页码：196 / 198

页数：3

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