Figure 4. Theoretical simulations of wavelength- and polarization-dependent emission patterns of a single modeled AuNF.

The radiation patterns at wavelengths of 633 nm and 730 nm correspond to the two scattering peaks related to the tip modes in the spectrum. Scattering patterns at a wavelength of 570 nm, which corresponds to the plasmonic resonances related to the AuNF core, are also presented. The black arrows indicate the directions of the excitation polarizations.