Fig. 5: CPL measured in Ag and Au triskelion arrays coated with IR-140 doped resist.
From: Chiral plasmonic superlattices from template-assisted assembly of achiral nanoparticles
a Maximum g-factor (maximum differences in the extinction for left and right- circularly polarized light) measured from colloidal Ag arrays made with colloids of 27 (green line), 32 (red line) and 36 nm (orange line), covered with a thin layer of SU8 resist (n ≈ 1.6) and collected at 21°, 31° and 42° angle of incidence. b Scheme of the resist coated nanoparticle arrays illustrating the different angles of collection at which the PL was collected. c–h Raw PL spectra measured under 760 nm excitation, represented by red and blue curves for left- and right-circularly polarized emission, respectively, and the corresponding photoluminescence dissymmetry factor glum quantifying differences in emission between the two polarizations (gray lines). PL and glum were collected from 36 nm Ag triskelion arrays at angles of −20° (c), 0° (d), and +20° (e), and from 54 nm Au triskelion arrays at angles of −10° (f), 0° (g), and +10° (h). Source data are provided as a Source Data file.
