Devilez Alexis, Bonod Nicolas, Wenger Jérôme, Gérard Davy, Stout Brian, Rigneault Hervé, Popov Evgeny
Institut Fresnel, Aix-Marseille Université, CNRS, 13397 Marseille, France.
Opt Express. 2009 Feb 16;17(4):2089-94. doi: 10.1364/oe.17.002089.
Dielectric microspheres are shown to be capable of confining light in a three-dimensional region of subwavelength dimensions when they are illuminated by tightly focused Gaussian beams. We show that a simple configuration, not involving resonances, permits one to reach an effective volume as small as 0.6 (lambda/n)(3). It is shown that this three-dimensional confinement arises from interferences between the field scattered by the sphere and the incident Gaussian beam containing high angular components.
当用紧聚焦高斯光束照射时，电介质微球能够将光限制在亚波长尺寸的三维区域内。我们表明，一种不涉及共振的简单配置能够使有效体积小至0.6(λ/n)³ 。结果表明，这种三维限制源于球体散射场与包含高角向分量的入射高斯光束之间的干涉。
