Journal
NANO LETTERS
Volume 14, Issue 5, Pages 2546-2551Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl5003526
Keywords
Nanoantenna; tight focusing; transversally spinning dipole; dielectric interface; waveguide
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We experimentally demonstrate all-optical control of the emission directivity of a dipole-like nanoparticle with spinning dipole moment sitting on the interface to an optical denser medium. The particle itself is excited by a tightly focused polarization tailored light beam under normal incidence. The position dependent local polarization of the focal field allows for tuning the dipole moment via careful positioning of the particle relative to the beam axis. As an application of this scheme, we investigate the polarization dependent coupling to a planar two-dimensional dielectric waveguide.
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