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Characterization of high order modes of plasmonic antenna formed by nanoparticle/thin film hybrid structures
Abstract
The plasmonic modes of a nano-antenna formed by a nanoparticle/thin film hybrid system
are investigated. Plasmonic nano-antennas are well-known for their capabilities to
concentrate electromagnetic wave into extreme small region and couple the emission
from active materials in proximity to the antennas into far-field region. Previously,
we have shown through direct measurement of emission profile images that the nano-antennas
not only enhance Raman emission but also systematically direct inelastic emission
to the far-field through the dipole mode. We also showed that high order modes of
the hybrid structure can be detected. Here, the higher order plasmonic modes are characterized
through imaging, variable angle linearly polarized excitation, and simulation. Through
spectral simulation with improved resolution, two distinct modes are found to contribute
to the broad band high order mode. One has dipole-like behavior and the other has
quadrupole-like behavior. The modes are characterized both through near-field distribution
and farfield scattering profiles. The quadrupole-like mode can be excited by both
p- and s-polarized light whereas the dipolelike mode is only excited by p-polarized
light. These high order modes are not as bright as the dipole mode in the farfield
spectrum but have substantial near field enhancement which can be utilized for surface-enhancing
spectroscopy and sensing. In addition, characterization of high order modes may serve
to clarify the interaction between nano-antenna and active materials and will lead
to design rules for applications of active plasmonic structures in integrated optical
circuits. © 2012 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).
Photonic and Phononic Properties of Engineered Nanostructures II;82691M.
Type
Journal articlePermalink
https://hdl.handle.net/10161/5725Published Version (Please cite this version)
10.1117/12.907700Publication Info
(2012). Characterization of high order modes of plasmonic antenna formed by nanoparticle/thin
film hybrid structures. Proceedings of SPIE - The International Society for Optical Engineering, 8269. pp. 82691M. 10.1117/12.907700. Retrieved from https://hdl.handle.net/10161/5725.This is constructed from limited available data and may be imprecise. To cite this
article, please review & use the official citation provided by the journal.
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David R. Smith
James B. Duke Distinguished Professor of Electrical and Computer Engineering
Dr. David R. Smith is currently the James B. Duke Professor of Electrical and Computer
Engineering Department at Duke University. He is also Director of the Center for Metamaterials
and Integrated Plasmonics at Duke and holds the positions of Adjunct Associate Professor
in the Physics Department at the University of California, San Diego, and Visiting
Professor of Physics at Imperial College, London. Dr. Smith received his Ph.D. in
1994 in Physics from the University of California, San D
Yaroslav A. Urzhumov
Adjunct Assistant Professor in the Department of Electrical and Computer Engineering
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<![endif]-->Dr. Urzhumov is Adjunct Assistant Professor of ECE at Duke University,
and also a Technologist at the Metamaterials Commercialization Center of Intellectual
Ventures. Previously a research faculty at Duke, he works on applied and theoretical
aspects of metama
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