Electromagnetic energy transfer and switching in nanoparticle chain arrays below the diffraction limit
Electromagnetic energy transfer and switching in nanoparticle chain arrays below the diffraction limit
复制标题
DOI：
10.1103/physrevb.62.r16356
复制
发表时间：
2000-12-15
影响因子：
3.7
通讯作者：
Atwater, HA
中科院分区：
文献类型：
--
作者：
Brongersma, ML;Hartman, JW;Atwater, HA
由紧密间隔的金属纳米颗粒链组成的等离子体线中的电磁能量转移可以借助于耦合等离子体模式在衍射极限以下发生。群速度超过0.1 c的相干传播在直线和尖角周围（弯曲半径远小于可见光的波长）是可能的。通过链式网络的能量传输可以以高效率进行，并且是等离子体激元模式的频率和偏振方向的强函数。尽管这些结构由于加热而表现出约3dB/500 nm的传输损耗，但它们具有在远小于1 μ m的长度尺度下不能以其他方式获得的光学功能。
Electromagnetic energy transfer in plasmon wires consisting of chains of closely spaced metal nanoparticles can occur below the diffraction limit by means of coupled plasmon modes. Coherent propagation with group velocities that exceed 0.1 c is possible in straight wires and around sharp corners (bending radius much less than wavelength of visible light). Energy transmission through chain networks is possible at high efficiencies and is a strong function of the frequency and polarization direction of the plasmon mode. Although these structures exhibit transmission losses due to heating of about 3 dB/500 nm, they have optical functionality that cannot be obtained in other ways at a length scale much less than1 mum.