We present a new method to pattern assemblies of gold
nanorods
(GNRs) on substrates and a study of the near-field coupling induced
by the aggregation of the nanoparticles. The combination of deep-UV
lithography and controlled deposition of functionalized GNRs generates
complex GNR assemblies. Near-field coupling is investigated by photoemission
electron microscopy (PEEM) on single, dimer, and elongated aggregates
of GNRs. This comparative study exhibits different kinds of near-field
coupling efficiency that occur depending of the incident light polarization,
interparticle gaps and angles between the nanorods. Hot spots of the
near-field are associated with the interparticle gap regions.
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