@article{KaschkeBlomeBurgeretal.2014, author = {Johannes Kaschke and Mark Blome and Sven Burger and Martin Wegener}, title = {Tapered N-helical metamaterials with three-fold rotational symmetry as improved circular polarizers}, journal = {Opt. Expr.}, volume = {22}, number = {17}, pages = {19936 -- 19946}, doi = {10.1364/OE.22.019936}, year = {2014}, }