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We discuss finite-difference time-domain simulations of femtosecond pulsesinteracting with silver nanowires and nanoparticles. We show how localized hotspots near the metal surfaces can be generated and controlled in aspatiotemporal manner. The control is made possible by chirping the pulses suchthat the effective frequency passes through surface plasmon resonancesassociated with different spatial regions of the nanostructure over the courseof time. The response of such nanostructures to chirped pulses could provide anovel means of encoding or decoding optical signals.Comment: 8 figure

Controlled spatiotemporal excitation of metal nanoparticles with picosecond optical pulses