Abstract

We examine the optical scattering from a variety of axially symmetric plasmonic nanoparticle dimers separated by nanoscale gaps, quantifying the role of classical nonlocality on their optical properties. Due to the rotational symmetry of the analyzed structures, a high degree of accuracy is achieved using a computational approach termed 2.5D modeling, in which a small number of simulations on a two-dimensional domain can replace a memory- and time-intensive simulation on a three-dimensional domain. We find that scattered light from dimers consisting of nanoparticles with flat surfaces, such as nanodisks, exhibits pronounced spectral shifts due to the nonlocality of the electron fluid; these significant shifts persist even at relatively large (>1nm) gap dimensions, where quantum tunneling effects are believed to be negligible. The 2.5D modeling technique accurately incorporates all responses due to any nonaxially symmetric eigenmodes of the system, such as dipolar and quadrupolar modes, thereby providing a complete characterization of the system for any excitation.

© 2013 Optical Society of America

Full Article  |  PDF Article
Related Articles
Plasmons in nearly touching metallic nanoparticles: singular response in the limit of touching dimers

Isabel Romero, Javier Aizpurua, Garnett W. Bryant, and F. Javier García de Abajo
Opt. Express 14(21) 9988-9999 (2006)

Modified field enhancement and extinction by plasmonic nanowire dimers due to nonlocal response

Giuseppe Toscano, Søren Raza, Antti-Pekka Jauho, N. Asger Mortensen, and Martijn Wubs
Opt. Express 20(4) 4176-4188 (2012)

Nanostructures for surface plasmons

Junxi Zhang and Lide Zhang
Adv. Opt. Photon. 4(2) 157-321 (2012)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

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 OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (6)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription