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We report experiments on propagation of scalar and vector optical beamsthrough random phase screens mimicking turbulence and show that the intensityprofile of the beam containing a C-point polarization singularity showsmaximally robust behavior. This observation is explained in terms of thepolarization and orbital angular momentum (OAM) diversity in the beam. The $l =0$ and $l = 1$ OAM states whose vector combination leads to the C-pointsingularity are seen to produce complementary speckle intensity patterns withsignificant negative correlation on propagation through a random phase screen.This unique property of C-point singularity makes it superior to otherinhomogeneous polarization states as demonstrated in our experiments. Theresults provide an important generic guideline for designing beams that canmaintain optimally robust beam intensity profile on passing through randomphase fluctuations and are expected to have a number of applications.

Optimal vector beams maintaining robust intensity profile on propagation through turbulence