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We show that pulse shaping techniques can be applied to tailor the ultrafasttemporal response of the strongly confined and enhanced optical near fields inthe feed gap of resonant optical antennas (ROAs). Using finite-differencetime-domain (FDTD) simulations followed by Fourier transformation, we obtainthe impulse response of a nano structure in the frequency domain, which allowsobtaining its temporal response to any arbitrary pulse shape. We apply themethod to achieve deterministic optimal temporal field compression in ROAs withreduced symmetry and in a two-wire transmission line connected to a symmetricdipole antenna. The method described here will be of importance for experimentsinvolving coherent control of field propagation in nanophotonic structures andof light-induced processes in nanometer scale volumes.

Deterministic spatio-temporal control of nano-optical fields in optical antennas and nano transmission lines