Plasmon Resonant Cavities in Vertical Nanowire Arrays

作者：Mihail Bora, Benjamin J. Fasenfest, Elaine Behymer, Allan Chang, Hoàng Tùng Nguyễn, Jerald A. Britten, Cindy Larson, James W. Chan, Robin Miles, Tiziana Bond · 发表于：Nano Letters · 年份：2010 · DOI：10.1021/nl1008376 · 被引用次数：72 · 研究领域：Plasmonic and Surface Plasmon Research、Photonic and Optical Devices、Photonic Crystals and Applications

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.