Fig. 4From: Scalable Fabrication of Quasi-Three-Dimensional Chiral Plasmonic Oligomers Based on Stepwise Colloid Sphere Lithography TechnologyThe measured SEM and AFM images of LHCPO and RHCPO with θ = 20°, k 1, 2, 3, 4 = 8, 25, 40, and 55 nm, respectively, and ΔΦ = ±60°. a, c From LHCPO. b, d From RHCPO. The insets in a and b are the enlarged images of one CPOBack to article page