GRADUATE STUDENT SEMINAR
Friday, 24th MARCH, 2:30pm, Robeson 304
Localized Surface Plasmon Resonance
Kai Chen
ABSTRACT
Surface Plasmon is the quanta of the collective motion of
electrons at a metal/dielectric interface. Localized Surface
Plasmon Resonance (LSPR) can be excited in some noble
metal nanostructures.
Silver nanoparticle (truncated
tetrahedron) arrays are fabricated by nanosphere lithography
(NSL). The extinction spectroscopy of these nanoparticle
arrays suggests that several plasmon modes are present in
our current silver nanostructures. Relationship between the
resonance wavelength and the nanoparticle height is
investigated as well as the sensitivity of the resonance
wavelength
to
the
external
environment.
Such
nanostructure-based LSPR can find application in the
nonlinear optical phenomena and nanosensors.