期刊
OPTICS EXPRESS
卷 17, 期 4, 页码 2089-2094出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.17.002089
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- Centre National de la Recherche Scientifique
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. (C) 2009 Optical Society of America
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