Controlled spatiotemporal excitation of metal nanoparticles with femtosecond pulses

Details Controlled spatiotemporal excitation of metal nanoparticles with femtosecond pulses Controlled spatiotemporal excitation of metal nanoparticles with femtosecond pulses

2004-06-08

arxiv.org/abs/physics/0406038v1

Physics

Optics

8 figures

Scientific paper

10.1103/PhysRevB.71.035423

We discuss finite-difference time-domain simulations of femtosecond pulses interacting with silver nanowires and nanoparticles. We show how localized hot spots near the metal surfaces can be generated and controlled in a spatiotemporal manner. The control is made possible by chirping the pulses such that the effective frequency passes through surface plasmon resonances associated with different spatial regions of the nanostructure over the course of time. The response of such nanostructures to chirped pulses could provide a novel means of encoding or decoding optical signals.

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