Microsphere-chain waveguides: Focusing and transport properties

被引：45

作者：

Allen, Kenneth W. ^{[1
,2
]}

Darafsheh, Arash ^{[1
]}

Abolmaali, Farzaneh ^{[1
]}

Mojaverian, Neda ^{[2
]}

Limberopoulos, Nicholaos I. ^{[2
]}

Lupu, Anatole ^{[3
]}

Astratov, Vasily N. ^{[1
,2
]}

机构：

[1] Univ N Carolina, Dept Phys & Opt Sci, Ctr Optoelect & Opt Commun, Charlotte, NC 28223 USA

[2] US Air Force, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA

[3] Univ Paris 11, CNRS, UMR 8622, Inst Elect Fondamentale, F-91405 Orsay, France

来源：

APPLIED PHYSICS LETTERS | 2014年 / 105卷 / 02期

基金：

美国国家科学基金会;

关键词：

WHISPERING-GALLERY MODES; LIGHT-PROPAGATION; SUBSTRATE; PARTICLES; BISPHERES; NANOJETS; SPHERES;

D O I：

10.1063/1.4890595

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

It is shown that the focusing properties of polystyrene microsphere-chain waveguides (MCWs) formed by sufficiently large spheres (D >= 20 lambda, where D is the sphere diameter and lambda is the wavelength of light) scale with the sphere diameter as predicted by geometrical optics. However, this scaling behavior does not hold for mesoscale MCWs with D <= 10 lambda resulting in a periodical focusing with gradually reducing beam waists and in extremely small propagation losses. The observed effects are related to properties of nanojet-induced and periodically focused modes in such structures. The results can be used for developing focusing microprobes, laser scalpels, and polarization filters. (C) 2014 AIP Publishing LLC.

引用

页数：4

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