Fig. 1.

Calculation demonstrating how the near-field coupling modifies the far-field scattering spectra of a structure placed on a glass substrate. (A) The scattering spectra of an NP–QD hybrid excited by the unpolarized evanescent wave coming from the glass substrate side in all azimuthal angles. The angle ${\phi }_A$ indicates the orientation of the analyzer in the path of the scattered light. The Fano feature is the most (least) prominent when the orientation of the analyzer is parallel (perpendicular) with the in-plane component of the Fano axis, which connects the QD and MNP centers. (B and C) The field near the NP–QD hybrid at 500 and 552 nm, respectively, as indicated by the black arrows in the scattering spectrum at ${\phi }_A=0$ in A. The scattering signal at these two wavelengths is the same (indicated by the dotted line on the blue curve) whereas the MNP is excited much more strongly in C. This wavelength dependence proves that the presence of the QD indeed controls the MNP’s scattering and anisotropy resonantly.