Improved focusing with Hypergeometric-Gaussian type-II optical modes
Optics
2009-11-13 v2
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 at waist of HyGG-II among all known finite power families of paraxial modes. 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.
Cite
@article{arxiv.0811.0551,
title = {Improved focusing with Hypergeometric-Gaussian type-II optical modes},
author = {Ebrahim Karimi and Bruno Piccirillo and Lorenzo Marrucci and Enrico Santamato},
journal= {arXiv preprint arXiv:0811.0551},
year = {2009}
}
Comments
6 pages, 3 figures