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Opt Lett. 2011 Aug 15;36(16):3106-8. doi: 10.1364/OL.36.003106.

Fraunhofer diffraction of light with orbital angular momentum by a slit.

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  • 1Optics and Materials Group–Optma, Universidade Federal de Alagoas, Caixa Postal 2051, Maceió, Alagoas, 57061-970, Brazil.


We study the Fraunhofer diffraction problem while taking into account the orbital angular momentum of light. In this case, the phase singularity of the light beam is incident on the slit in two different cases: in one, it is incident slightly above the slit, and in the other it is centered on the slit. We observed that the symmetry and the fringe formation in the interference pattern strongly depend on the amount of orbital angular momentum and the slit position in relation to the beam.

© 2011 Optical Society of America

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