Focusing light to a tighter spot
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S Quabis; R Dorn; M Eberler; O GlΓΆckl; G Leuchs
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Article
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2000
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Elsevier Science
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English
β 278 KB
The smallest spot sizes are reached by focusing an annular shaped light beam with a high aperture lens. We show theoretically that the focal area is further reduced when using a novel radially polarized instead of a linearly polarized light w x annulus. In the vicinity of the focus there is a large