Departmental Papers (ESE)
Abstract
AYagi-Uda-like optical nanoantenna concept using resonant core-shell plasmonic particles as its “reflectors” and “directors” is studied numerically. Such particles when placed near an optical dipole source in a certain arrangement may exhibit large induced dipole moments, resulting in shaping the far-field radiation pattern, analogous to the far field of classical Yagi-Uda antennas in the microwave regime. The variation of the ratio of radii in concentric core-shell nanostructure is used to tailor the phase of the polarizabilities of the particles and, consequently, the antenna’s far-field pattern. The idea of a nanospectrum analyzer is also briefly proposed for molecular spectroscopy.
Document Type
Journal Article
Date of this Version
12-6-2007
Date Posted: 27 January 2011
This document has been peer reviewed.
Comments
Suggested Citation:
J. Li, A. Salandrino, and N. Engheta. (2007). "Shaping light beams in the nanometer scale: A Yagi-Uda nanoantenna in the optical domain." Physical Review B. 76, 245403.
© 2007 The American Physical Society
http://dx.doi.org/10.1003/PhysRevB.76.245403