Fig. 3: Enantio-sensitive excitation of rotating chiral dipoles by circularly polarised light.
From: Unidirectional chiral scattering from single enantiomeric plasmonic nanoparticles
a The schematics of the excitation of rotating chiral dipoles in a L-nanohelicoid by circularly polarised light with the corresponding simulated far-field scattering intensity and polarisation diagrams. b, c Numerically calculated magnitudes and relative phases of the chiral dipoles excited in a 180 nm gold L-nanohelicoid in SiO2 with (b) a LCP and (c) a RCP plane wave propagating in the − z direction. d, e Far-field scattering intensity and polarisation diagrams calculated at the wavelength of 620 nm in cases (b) and (c), respectively. The colour indicates the polarisation state of the scattered light calculated from Stokes parameters S3/S0 (1: RCP; −1: LCP). f Simulated spectral dependence of a nanohelicoid scattering g-factor. g, h Integrated intensities for RCP and LCP polarisations of the scattered light in cases (b) and (c), respectively. Source data are provided as a Source Data file.
