Open AccessOptimized tapered dipole nanoantenna as efficient energy harvester
Author(s) -
Youssef M. El-Toukhy,
Mohamed Hussein,
Mohamed Farhat O. Hameed,
A. M. Heikal,
Maher M. Abd-Elrazzak
Publication year - 2016
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.0a1107
Subject(s) - return loss , dipole , optics , antenna (radio) , energy harvesting , materials science , dipole antenna , electrical impedance , particle swarm optimization , optoelectronics , energy (signal processing) , physics , computer science , telecommunications , quantum mechanics , machine learning
In this paper, a novel design of tapered dipole nanoantenna is introduced and numerically analyzed for energy harvesting applications. The proposed design consists of three steps tapered dipole nanoantenna with rectangular shape. Full systematic analysis is carried out where the antenna impedance, return loss, harvesting efficiency and field confinement are calculated using 3D finite element frequency domain method (3D-FEFD). The structure geometrical parameters are optimized using particle swarm algorithm (PSO) to improve the harvesting efficiency and reduce the return loss at wavelength of 500 nm. A harvesting efficiency of 55.3% is achieved which is higher than that of conventional dipole counterpart by 29%. This enhancement is attributed to the high field confinement in the dipole gap as a result of multiple tips created in the nanoantenna design. Furthermore, the antenna input impedance is tuned to match a wide range of fabricated diode based upon the multi-resonance characteristic of the proposed structure.