Nonlinear metal-dielectric nanoantennas for light switching and routing

Abstract

We introduce a novel hybrid metal-dielectric nanoantenna composed of dielectric (crystalline silicon) and metal (silver) nanoparticles. A high-permittivity dielectric nanoparticle allows to achieve effective light harvesting, and nonlinearity of a metal nanoparticle controls the radiation direction. We show that the radiation pattern of such a nanoantenna can be switched between the forward and backward directions by varying only the light intensity around the level of 11 MW/cm${}^2$, with the characteristic switching time of 260 fs.

9 pages, 5 figures, submitted to New J. Phys

References in corpus (2)

• Plasmons in nearly touching metallic nanoparticles: singular response in the limit of touching dimers
• Subwavelength modulational instability and plasmon oscillons in nanoparticle arrays

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