Authors: F I Baida A Belkhir
Publish Date: 2009/01/10
Volume: 4, Issue: 1, Pages: 51-59
Abstract
We theoretically demonstrate the possibility of obtaining nanosources through an original schema based on the generation of the radially polarized surface plasmon mode of a cylindrical metallic tip This mode has no cutoff radius and can propagate along the tip walls until its nanometricsized apex Instead of radiating from the tip end the guided mode will give rise to a nanospotlight via the wellknown antenna effect 3D calculations demonstrate that both surface plasmonguided mode and antenna effect are directly involved in the light confinement Nearfield optical microscopy can benefit significantly from this kind of probe because the sample does not need to be directly illuminated
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