Abstract
In plasmonic nanoparticles, scattering and absorption phenomena are
exploited to functionalize them for various applications. Recent research
in plasmonic nanoparticles has extended the classic circuit concepts to the
optical domain, but under the assumption of only accounting for the fundamental
mode (dipole mode) with restrictions placed on the wavelength and size of
the nanoparticle. In this paper, we propose an extended approach to the impedance
representation of metallic nanoparticles and develop a solution consisting
of circuit elements representing their behaviour without any constraints on
wavelength, size and material properties. This model offers an intuitive understanding
of the qualitative behaviour of a metallic nanoparticle, and rigorously develops
an all-mode (i.e., <i>TE</i><sub>m,n</sub> and <i>TM</i><sub>m,n</sub> mode with <i>m</i>
= 1 and <i>n</i> varying from 1 → ∞) exact impedance model. The proposed model
originates from the rigorous Mie solution. Quantities such as scattering,
extinction and absorption cross-sectional areas are derived using voltages,
currents and circuit elements and their equivalence is compared with well-known
field solutions and full-wave simulations.
© 2011 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription