期刊
NANO LETTERS
卷 10, 期 8, 页码 2832-2837出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl1008376
关键词
Plasmon; resonant cavity; nanowire; metal-dielectric-metal
类别
资金
- U.S. Department of Energy [DE-AC52-07NA27344, LLNL-JRNL-425128]
- DARPA SERS ST Fundamentals
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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