Abstract:
The optical scattering and absorption of gold nanorods (GNRs) depends on its
size, shape, andsurroundings. This dependence is due to both intrinsic and extrinsic effects.
A good understandingof this dependence is needed for applications of GNRs in photothermal
therapy, optical and opto-acoustic imaging, biosensing, and other photonic areas.
We have modeled, by finite element analysis, the process of absorption of a simple gold
nanorod and gold coated Tio2 nanorod in the same surrounding medium (water), and we
have calculated and compared the absorption cross section of simple and complex GNRs.
Finally we have modeled a dipolar excitation; the nanoshell is illuminated via a dipole
excitation source (the dipole source placed inside the gold nanoshell)
