(a) Plasmonic resonances along the long (red circles) and the short (black circles) axis of our dimer antenna on low-conductivity ITO, covered with a 20 nm layer of low-conductivity ITO. The inset shows a SEM picture of the antenna, with the scale bar being for 200 nm. (b) and (c) depict the time traces of the pump probe nonlinear response, (b) for the longitudinal and (c) for the transversal mode.
