Compact metallo-dielectric optical antenna for ultra directional and enhanced radiative emission

Details Compact metallo-dielectric optical antenna for ultra directional and enhanced radiative emission Compact metallo-dielectric optical antenna for ultra directional and enhanced radiative emission

2010-03-25

arxiv.org/abs/1003.4880v1

Physics

Optics

Scientific paper

We report the design of highly efficient optical antennas employing a judicious synthesis of metallic and dielectric materials. In the proposed scheme, a pair of metallic coupled nanoparticles permits large enhancements in both excitation strength and radiative decay rates, while a high refractive index dielectric microsphere is employed to efficiently collect light without spoiling the emitter quantum efficiency. Our simulations indicate potential fluorescence rate enhancements of 3 orders of magnitude over the entire optical frequency range.

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