Surface plasmon propagation in metallic nanostructures
Surface plasmon propagation in metallic nanostructures
Seidel, J.; Grafström, S.; Bischoff, L.; Eng, L.
The generation of surface plasmon polaritons (SPPs) at isolated nanoholes in 100 nm thick Au films is studied using near-field scanning optical microscopy. Finite-difference time-domain calculations,some explicitly including a model of the scanning tip, are used to interpret the results. We find the holes act as point-like sources of SPPs and demonstrate that the interference between the SPP and a directly transmitted wave allows determination of the wavelength, phase, and decay length of the SPP. The near-field intensity patterns can be manipulated by varying the angle and polarization of the incident beam.
Keywords: surface plasmon polaritons; focused ion beam; nanostructures
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Lecture (Conference)
Int. Workshop and Seminar on Cooperative Phenomena in Optics and Transport in Nanostructures, 10.-20.06.2004, Dresden, Germany
Permalink: https://www.hzdr.de/publications/Publ-9765