Journal
NANO LETTERS
Volume 10, Issue 8, Pages 2832-2837Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl1008376
Keywords
Plasmon; resonant cavity; nanowire; metal-dielectric-metal
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Funding
- U.S. Department of Energy [DE-AC52-07NA27344, LLNL-JRNL-425128]
- DARPA SERS ST Fundamentals
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We investigate tunable plasmon resonant cavity arrays in paired parallel nanowire waveguides. Resonances are observed when the waveguide length is an odd multiple of quarter plasmon wavelengths, consistent with boundary conditions of node and antinode at the ends. Two nanowire waveguides satisfy the dispersion relation of a planar metal-dielectric-metal waveguide of equivalent width equal to the square field average weighted gap. Confinement factors over 10(3) are possible due to plasmon focusing in the interwire space.
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