title: Diffraction of a plane, finite-radius wave by a spiral phase plate.
abstract: We derive analytical expressions containing a hypergeometric function to describe the Fresnel and Fraunhofer diffraction of a plane wave of circular and ringlike cross section by a spiral phase plate (SPP) of an arbitrary integer order. Experimental diffraction patterns generated by an SPP fabricated in resist through direct e-beam writing are in good agreement with the theoretical intensity distribution.
authors: Image Processing Systems Institute, Russian Academy of Sciences, Samara State Aerospace University, Russia.
authors: V V
authors: VV
authors: Kotlyar
authors: S N
authors: SN
authors: Khonina
authors: A A
authors: AA
authors: Kovalev
authors: V A
authors: VA
authors: Soifer
authors: H
authors: H
authors: Elfstrom
authors: J
authors: J
authors: Turunen