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
Diffraction and Gratings
Original Manuscript: May 6, 2013
Manuscript Accepted: June 24, 2013
Published: September 26, 2013
Etienne Brasselet, "Optical angular momentum conversion in a nanoslit: comment," Opt. Lett. 38, 3890-3890 (2013)