Guided Propogation Along Quadrupolar Chains of Plasmonic Nanoparticles

Loading...
Thumbnail Image
Penn collection
Departmental Papers (ESE)
Degree type
Discipline
Subject
Electrical and Computer Engineering
Engineering
Funder
Grant number
License
Copyright date
Distributor
Related resources
Author
Alù, Andrea
Contributor
Abstract

The employment of periodic arrays of plasmonic nanoparticles has been proposed by several groups for enhanced transmission or absorption and for realizing optical nanowaveguides. Generally, due to their small transverse dimensions, such linear arrays have been operated near their dipolar resonance. However, it has been recently shown that nanoscale plasmonic particles may also support higher-order resonances, which provide some advantages in different applications. Here we derive a full-wave analytical closed-form dispersion equation for the guided and leaky modes supported by linear chains of nanoparticles near a quadrupolar resonance. We show that, despite the vanishing bandwidth of the individual quadrupolar resonance in each of the nanoparticles composing the chain, the overall bandwidth of quadrupolar chain guidance is relatively large due to strong coupling, even considering realistic losses and frequency dispersion of optical materials. Applications for low-damping optical nanotransmission lines and leaky-wave nanoantennas are suggested.

Advisor
Date Range for Data Collection (Start Date)
Date Range for Data Collection (End Date)
Digital Object Identifier
Series name and number
Publication date
2009-06-12
Journal title
Volume number
Issue number
Publisher
Publisher DOI
Journal Issue
Comments
Suggested Citation: Alù, A. and Engheta, N. (2009). "Guided propagation along quadrupolar chains of plasmonic nanoparticles." Physical Review B. 79, 235412. © 2009 The American Physical Society http://dx.doi.org/10.1103/PhysRevB.79.235412
Recommended citation
Collection