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Nano Lett. 2010 Sep 8;10(9):3389-94. doi: 10.1021/nl101285t.

Controlling plasmonic wave packets in silver nanowires.

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Department of Chemistry and The James Franck Institute, 929 East 57th Street, The University of Chicago, Chicago, Illinois 60637, USA.


Three-dimensional finite-difference time-domain simulations were performed to explore the excitation of surface plasmon resonances in long silver (Ag) nanowires. In particular, we show that it is possible to generate plasmonic wave packets that can propagate along the nanowire by exciting superpositions of surface plasmon resonances. By using an appropriately chirped pulse, it is possible to transiently achieve localization of the excitation at the distal end of the nanowire. Such designed coherent superpositions will allow realizing spatiotemporal control of plasmonic excitations for enhancing nonlinear responses in plasmonic "circuits".


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