Self-reconstruction property of fractional Bessel beams: comment.
An expression for the complex amplitude of a fractional Bessel beam [J. Opt. Soc. Am. A21, 1192 (2004)] is not a proper solution of the Helmholtz equation.
Marston
Philip L
PL
Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164-2814, USA. marston@wsu.edu