  Plasmonic nano-objects have shown great potential in enhancing biological and
chemical sensing, light harvesting and energy transfer, and optical and quantum
computing to name a few. Therefore, an extensive effort has been vested in
optimizing plasmonic systems and exploiting their field enhancement properties.
Super-resolution imaging with quantum dots (QDs) is a promising method to probe
plasmonic near-fields, but is hindered by the distortion of the emission
intensity and radiation pattern. Here we investigate the interaction between
QDs and 'L-shaped' gold nanoantennas, and demonstrate both theoretically and
experimentally that this strong interaction can induce polarization-dependent
modifications to the apparent QD emission intensity, polarization and
localization. Based on FDTD simulations and polarization-modulated
single-molecule microscopy, we show that the displacement of the emitter's
localization is due to the interference between the emitter and the induced
dipole and can be up to 100 nm. We also discovered that the emission
polarization can rotate towards the symmetry axis or one arm of the L-shape
because of the scattering. Our results could assist in paving a pathway for
higher precision plasmonic near-field mapping and its underlying applications.
