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 application
Improved focusing with Hypergeometric-Gaussian type-II optical modes / Karimi, Ebrahim; Piccirillo, Bruno; Marrucci, Lorenzo; Santamato, Enrico. - In: OPTICS EXPRESS. - ISSN 1094-4087. - STAMPA. - 16:(2008), pp. 21069-21075. [10.1364/OE.16.021069]
Improved focusing with Hypergeometric-Gaussian type-II optical modes
KARIMI, ebrahim;PICCIRILLO, BRUNO;MARRUCCI, LORENZO;SANTAMATO, ENRICO
2008
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 applicationI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
