Fig. 4: Experimental demonstration of a noncomplementary MPM with high Tcross-CP.
From: Plasmonic metasurfaces with 42.3% transmission efficiency in the visible
a SEM image of a fabricated MPM and an enlarged view of two meta-atoms, in which asymmetric air gaps are clearly observable. The red dashed lines mark the edges of the air gaps. b, c Simulated and measured LP (b) and cross-CP (c) transmittances. The solid, dashed, and dash-dotted lines represent the experimental results, simulation of the noncomplementary MPM with d1,4 = 0 and d2,3 = 20 nm, and simulation of the complementary MPM, respectively. The measured efficiency is higher than that for the simulation of the complementary MPM by ~7%, confirming the role of tuning the multipole response in approaching the generalized Kerker condition
