Experimental measurements of the nonplanar phase of scalar optical beams is achieved using polarization singularities and Stokes parameters. The product of beam intensity and its phase gradient is calculated to get the Poynting vector distribution in the beam cross section. Using these we propose a scheme and experimentally obtain generic fundamental spiral, node, and saddle topological structures in the Poynting vector field.
© 2013 Optical Society of America
Original Manuscript: August 6, 2013
Revised Manuscript: August 27, 2013
Manuscript Accepted: August 27, 2013
Published: September 26, 2013
Vijay Kumar and Nirmal K. Viswanathan, "Topological structures in the Poynting vector field: an experimental realization," Opt. Lett. 38, 3886-3889 (2013)