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

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

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Date Posted: 27 January 2011

This document has been peer reviewed.