Discontinuous space variant sub-wavelength structures for generating radially polarized light in visible regionZ. Ghadyani, S. Dmitriev, N. Lindlein, G. Leuchs, O. Rusina and I. HarderJ. Eur. Opt. Soc.-Rapid Publ., 6 (2011) 11041DOI: https://doi.org/10.2971/jeos.2011.11041
