Shaped nondiffracting beams.
We demonstrate that nondiffracting beams can be generated with an arbitrary transverse shape. In particular, we show that the azimuthal complex modulation of the angular spectra of Helmholtz-Gauss wave fields constitutes a degree of freedom sufficient to tailor nondiffracting beams with an intensity pattern of choice.
López-Mariscal
Carlos
C
National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8424, USA. clopez@nist.gov
Helmerson
Kristian
K