Abstract
In this paper, metallic photonic crystals (PC) based on 2-D periodic
arrays of gold nanoparticles were investigated on indium tin oxide slab waveguides
using 3-D finite-difference time domain simulations with nonuniform mesh techniques.
The PC effects were studied by changing the lattice constants from 300 to
500 nm. The results obtained indicate that the waveguide-excited plasmon absorption
peak of periodic array of gold nanoparticles is tunable from 672 to 707 nm
due to the second grating order propagating backward at the grazing angle.
The nanoparticle-induced extinction of the waveguide mode was also investigated
by varying the slab thickness from 100 to 375 nm. The results show that the
extinction peak shifts from 650 to 705 nm. The theoretical results predict
that the interactions of the periodic array of gold nanoparticles are strongly
affected by the dispersion of the waveguide.
© 2009 IEEE
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