Open AccessPeculiar Properties of Loop Nanoantennas
Author(s) -
A. Locatelli
Publication year - 2011
Publication title -
ieee photonics journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.725
H-Index - 73
eISSN - 1943-0655
pISSN - 1943-0647
DOI - 10.1109/jphot.2011.2167603
Subject(s) - engineered materials, dielectrics and plasmas , photonics and electrooptics
The distinguishing features of circular loop nanoantennas based on cylindrical nanorods are thoroughly investigated by using numerical simulations. In particular, resonances of the input impedance are related to the resonant behavior of the plasmonic mode of the straight nanowire, and the phenomena of strong field confinement into a small gap region and tuning of the scattering strength are analyzed in detail. Moreover, radiation pattern and polarization properties of loop nanoantennas are described, and a careful comparison with the characteristics of optical dipoles is carried out. Circuit models are widely used throughout this paper to predict and justify the behavior of the nanostructure.