Cui, Xudong; Zhang, Weihua; Erni, Daniel; Dong, Lixin:

Optical properties of a nanomatch-like plasmonic structure

In: Virtual Journal on Biomedical Optics (reprint of the Journal of the Optical Society of America : A journal article, for citation please refer to this article), Jg. Vol. 5 (2010) ; No. 12
Zeitschriftenaufsatz / Fach: Elektrotechnik
Abstract:
The optical properties of a match-like plasmonic nanostructure are numerically investigated using full-wave
finite-difference time-domain analysis in conjunction with dispersive material models. This work is mainly motivated
by the developed technique enabling reproducible fabrication of nanomatch structures as well as the
growing applications that utilize the localized field enhancement in plasmonic nanostructures. Our research
revealed that due to the pronounced field enhancement and larger resonance tunabilities, some nanomatch topologies show potentials for various applications in the field of, e.g., sensing as well as a novel scheme for highly reproducible tips in scanning near field optical microscopy, among others. Despite the additional degrees
of freedom that are offered by the composite nature of the proposed nanomatch topology, the paper also reflects
on a fundamental complication intrinsic to the material interfaces especially in the nanoscale: stoichiometric
mixing. We conclude that the specificity in material modeling will become a significant issue in future research
on functionalized composite nanostructures.