Fig. 3From: Spin-Independent Plasmonic LensSimulated SPP field generated by LCP (a) and RCP (b) light. c, d The corresponding transversal and longitudinal distributions. The positions and profiles of the SPP focuses generated by LCP and RCP light are exactly the same. e, f The corresponding phase distributions around the focus. The two spiral phases with opposite directions in e and f can cancel out each other, which is the origin of spin-independent SPP focusingBack to article page