  We present measurements on plasmonic meta-molecules under local excitation
using cathodoluminescence which show a spatial redistribution of the local
density of optical states (LDOS) at the same frequency where a sharp spectral
Fano-feature in the extinction cross section has been observed. Our analytical
model shows that both near- and far-field effects arise due to interference of
the same two eigenmodes of the system. We present quantitative insights both in
a bare state, and in a dressed state picture that describe plasmonic Fano
interference either as near-field amplitude transfer between three coupled bare
states, or as interference of two uncoupled eigenmodes in the far field. We
identify the same eigenmode causing a dip in extinction to strongly enhance the
radiative LDOS, making it a promising candidate for spontaneous emission
control.
