Journal
OPTICS LETTERS
Volume 31, Issue 11, Pages 1597-1599Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.31.001597
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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. (c) 2006 Optical Society of America.
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