Effect of Crossing Geometry on the Plasmonic Behavior of Dielectric Core/Metal Sheath Nanowires
Abstract
We have shown that dielectric/metal composite nanowires exhibit very strong surface enhanced Raman spectroscopy SERS signals when arranged in a random three-dimensional geometry. Since the intersections of the nanowires are critical in generating the high electric fields necessary for this enhancement, we are investigating this effect under more controlled conditions. We examined nanowire arrays formed by e-beam lithography and we have examined the plasmonic effects, both longitudinal and transverse, due to changes in crossing geometry by specific placements of dielectric/metal nanowires on these arrays. Results indicate significant angular effects on the SERS enhancement supported by electric field calculations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 2009
- Accession Number
- ADA536638
Entities
People
- D. A. Alexson
- H. D. Park
- O. J. Glembocki
- R. W. Rendell
- Sharka M. Prokes
Organizations
- United States Naval Research Laboratory