Highly directive Fabry-Perot leaky-wave nanoantennas based on optical partially reflective surfaces

Highly directive Fabry-Perot leaky-wave nanoantennas based on optical partially reflective surfaces

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 simula...

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Bibliographic Details
Published in:Applied physics letters Vol. 106; no. 18
Main Authors: Lorente-Crespo, M., Mateo-Segura, C.
Format: Journal Article
Language:English
Published: Melville American Institute of Physics 04-05-2015
Subjects:
ANTENNAS
Applied physics
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
CONFINEMENT
CONVERSION
Directivity
ELECTROMAGNETIC FIELDS
Far fields
Leaky waves
LOSSES
MIRRORS
Nanoantennas
PLASMONS
RADIATORS
SILVER
SURFACES
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Description
Summary: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.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4919790