The extent to which light can be focused with conventional optics is limited to λ/2 by the phenomenon of diffraction.
Optical energy needs to be focused to less than 100nm to enable improvement and innovation in nanoscale applications.
A novel lens structure to focus surface plasmons to a few tens of nanometer with high throughput is described here. This
paper outlines the theoretical design and fabrication considerations of this novel plasmonic lens structure.
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