Improved focusing with Hypergeometric-Gaussian type-II optical modes
- 4 December 2008
- journal article
- Published by Optica Publishing Group in Optics Express
- Vol. 16 (25), 21069-21075
- https://doi.org/10.1364/oe.16.021069
Abstract
We present a novel family of paraxial optical beams having a confluent hypergeometric transverse profile, which we name hypergeometric Gauss modes of type-II (HyGG-II). These modes are eigenmodes of the photon orbital angular momentum and they have the lowest beam divergence in the waist of HyGG-II among all known finite power paraxial modes families. We propose to exploit this feature of HyGG-II modes for generating, after suitable focusing, a “light needle” having record properties in terms of size and aspect ratio, possibly useful for near-field optics applications.Other Versions
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