Liu Zhaowei, Wang Yuan, Yao Jie, Lee Hyesog, Srituravanich Werayut, Zhang Xiang
NSF Nanoscale Science and Engineering Center (NSEC), 5130 Etcheverry Hall, University of California, Berkeley, California, 94720, USA.
Nano Lett. 2009 Jan;9(1):462-6. doi: 10.1021/nl803460g.
A plasmonic interference pattern can be formed when multiple surface plasmon waves overlap coherently. Utilizing a sharp edge coupling mechanism, we experimentally demonstrate plasmonic interference patterns that can be designed at will by shaping the edges in a metallic film. The patterns can also be dynamically tailored by adjusting the wavelength, the polarization, and the incident angle of the excitation light beam. Possessing the subdiffraction limited feature resolution, this dynamical manipulation method of surface plasmon patterns will have profound potentials in nanolithography, particle manipulation, and other related fields.
当多个表面等离子体波相干重叠时，可以形成等离子体干涉图案。利用尖锐边缘耦合机制，我们通过对金属薄膜中的边缘进行整形，实验证明了可以随意设计的等离子体干涉图案。这些图案还可以通过调整激发光束的波长、偏振和入射角进行动态调整。这种表面等离子体图案的动态操纵方法具有亚衍射极限特征分辨率，在纳米光刻、粒子操纵和其他相关领域将具有深远的潜力。
