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Title: 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 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.
Authors:
;  [1]
  1. Institute of Sensors, Signals and Systems, Heriot-Watt University, EH14 4AS Edinburgh (United Kingdom)
Publication Date:
OSTI Identifier:
22399014
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 18; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANTENNAS; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; CONFINEMENT; CONVERSION; ELECTROMAGNETIC FIELDS; LOSSES; MIRRORS; PLASMONS; RADIATORS; SILVER; SURFACES