CST – Computer Simulation Technology

Highly directive Fabry-Perot leaky-wave nanoantennas based on optical partially reflective surfacesrence
M. Lorente-Crespo, C. Mateo-Segura
Applied Physics Letters (AIP Publishing)
Vol. 106
Nanoantennas enhance the conversion between highly localized electromagnetic fields and far-field radiation. Here, we investigate the response of a nano-patch partially reflective surface backed with a silver mirror to an optical source embedded at the centre of the structure. Using full wave simulations, we demonstrate a two orders of magnitude increased directivity compared to the isotropic radiator, 50% power confinement to a 13.8° width beam and a ±16?nm bandwidth. Our antenna does not rely on plasmonic phenomena thus reducing non-radiative losses and conserving source coherence

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