Diffraction of a plane, finite-radius wave by a spiral phase plate |
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| Authors: | Kotlyar V V Khonina S N Kovalev A A Soifer V A Elfstrom H Turunen J |
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| Institution: | Image Processing Systems Institute, Russian Academy of Sciences, Samara State Aerospace University, Russia. |
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| 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. |
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