Active Plasmonics: Controlling Signals in Au/Ga Waveguide using Nanoscale Structural Transformations

Details Active Plasmonics: Controlling Signals in Au/Ga Waveguide using Nanoscale Structural Transformations Active Plasmonics: Controlling Signals in Au/Ga Waveguide using Nanoscale Structural Transformations

2003-10-22

arxiv.org/abs/cond-mat/0310530v1

Physics

Condensed Matter

Materials Science

RevTeX 4, 3 pages

Scientific paper

10.1063/1.1650904

We develop a new concept for active plasmonics exploiting nanoscale structural transformations which is supported by rigorous numerical analysis. We show that surface plasmon-polariton signals in a metal-on-dielectric waveguide containing a gallium section a few microns long can be effectively controlled by switching the structural phase of gallium. The switching may be achieved by either changing the waveguide temperature or by external optical excitation. The signal modulation depth could exceed 80 percent and switching times are expected to be in the picosecond-microsecond time scale.

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