Abstract

In a recent work [Opt. Lett. 37, 4946 (2012)], the spin-to-orbital optical angular momentum conversion from a subwavelength slit having a circular shape has been reported. In particular, the conversion efficiency was claimed to be independent of the slit dichroism. Here, we correct such a statement and demonstrate that dichroism strongly influences the process of optical vortex generation.

© 2013 Optical Society of America

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