Journal
JOURNAL OF APPLIED PHYSICS
Volume 107, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3309409
Keywords
gold; nanophotonics; nanostructured materials; optical focusing; optical losses; rods (structures); surface plasmons
Categories
Funding
- Australian Research Council
- Australian Federal Police
- National Institute of Forensic Science [LP0882614]
- Australian Research Council [LP0882614] Funding Source: Australian Research Council
Ask authors/readers for more resources
We studied adiabatic nanofocusing of strongly localized surface plasmons in tapered metal rods with parabolic perturbations of the conical shape of the taper. Typical plasmon propagation parameters and local field enhancements are determined along the tapered rod, depending on the shape and plasmon frequency (wavelength). In particular, it is demonstrated that metal rods with tapered convex shape are more efficient in achieving larger local field enhancements at the tip, as compared to rods with the concave shape of the taper. This is explained by weaker dissipative losses in tapered rods with convex shape. In addition, plasmon nanofocusing in tapered rods with convex shape is less sensitive to further variations of the shape. As a result, it is demonstrated that tapered rods with the convex shape could be advantageous for practical applications where strong local field enhancement near the tip is required, and/or where metal rods with relatively large dissipation are used. The obtained results will be important for optimization and practical fabrication of efficient nanofocusing structures using tapered metal rods.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available