P7 – Scattering of Surface Plasmon Polaritons by Gold ... - repetit.dk

Institute of Physics and Nanotechnology
Aalborg University, Skjernvej 4A, 9220 Aalborg Øst, Denmark
Title:
Scattering of Surface Plasmon Polaritons
by Gold Nanoparticles
Project Periode:
P7, 1/9-07 - 20/12-07
Project Group:
Nano, Gr. N7.210
Groupmembers:
Jeppe Mørch Nørgaard
René Petersen
Supervisor:
Sergey Bozhevolnyi
Ilya Radko
Number of Copies: 6
Number of Pages: 60
Number of Appendices: 2
Total Number of Pages: 66
Synopsis:
In this project the scattering of surface
plasmon polaritons (SPPs) on
gold surfaces by gold nanoparticles is
treated theoretically and experimentally.
Two theoretical models are developed,
a scalar model and a vectorial
model and it is shown that in
a certain limit the two models correspond
to each other. The vectorial
model is based on the Greens tensor
formalism. The main focus of the
project is focusing of SPP beams by
parabolic chains of nanoparticles but
other structures are investigated theoretically
as well. Excitation of SPPs
in the Kretschmann-Raether configration
is tried out experimentally and
the conditions for minimum reflection
intensity are discussed. It is
shown that the reflection intensity
can be well described using Fresnel
theory. The focusing of SPPs by
parabolic chains of nanoparticles are
investigated experimentally and theoretically
and it is shown that the
model corresponds well to the experiments.