Shaping light beams in the nanometer scale: A Yagi-Uda nanoantenna in the optical domain

By Jingjing Li, A. Salandrino, Nader Engheta. 2007

226 citations recorded by the source corpus.

A Yagi-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.

Subfields: Atomic and Molecular Physics, and Optics, Biomedical Engineering

View Paper: https://www.semanticscholar.org/paper/1253ae325bde8205278291e9722a724675c55a8e

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In Atomic and Molecular Physics, and Optics

In Biomedical Engineering

Citations in the corpus

Plasmonic nanoantenna arrays for the visible (2008, background): “In most of the studies, the optical nanoantennas consist of paired metallic nanostructures including 2D structures such as metal strips [2,15–17] and 3D structures such as nanorods [1,12,18], bow-tie particles [10,11,19–24], nanodiscs [25,26], spheres [27], and other shapes like core-shell structure”
Nanoantennas for visible and infrared radiation (2011, background): “Yagi-Uda nanoantennas for light have been theoretically proposed and experimentally demonstrated [181-185] to take advantage of their very good directivity.”
Plasmonic circuits for manipulating optical information (2016, unknown): “Examples of different optical antenna designs are the Yagi-Uda antenna [180, 181], cross antennas [182], J-pole [183, 184], V antennas [183], and bow-tie antennas [185].”