Coherent imagin of nanoscale plasmon patterns with a carbon nanotue optical probe
R Hillenbrand, F Keilmann, P Hanarp, D S. Sutherland, J Aizpurua
We introduce a carbon nanotube as optical near-field probe and apply it to visualize the plasmon fields of metal nanostructures in both amplitude and phase at 30 nm resolution. With 91 nm Au disks designed for fundamental plasmon resonance, we observe the antiphase optical fields near two pole regions that are evidence of dipolar oscillation, in good agreement with theoretical field patterns. This opens the door to phase-sensitively map optical propagation and storage in photoonic crystals and nanoptic resonators or circuits, in particular to verify coherent control of plasmon polaritons.
, Keilmann, F.
, Hanarp, P.
, Sutherland, D.
and Aizpurua, J.
Coherent imagin of nanoscale plasmon patterns with a carbon nanotue optical probe, Applied Physics Letters
(Accessed May 28, 2023)