Tamma Venkata Ananth, Lee Jin-Hyoung, Wu Qi, Park Wounjhang
Department of Electrical, Computer, and Energy Engineering, University of Colorado, Boulder, Colorado 80309-0425, USA.
Appl Opt. 2010 Mar 1;49(7):A11-7. doi: 10.1364/AO.49.000A11.
We experimentally observe magnetic resonance in the visible frequency region from self-assembled silver nanocluster metamaterials. Extensive numerical modeling studies were conducted to find the optimal nanocluster dimensions. Self-assembly of silver nanoparticles coated with nanoscale silica coating was then performed on polymer templates fabricated by laser interference lithography. The nanoclusters supported magnetic resonance in the visible region, and the extracted effective permeability exhibited Lorentz-like resonance. The experimentally observed lowest value for the real part of permeability was 0.06. The nanocluster metamaterial represents a practical metamaterial architecture that is compatible with the scalable bottom-up manufacturing process.
我们通过实验观察到自组装银纳米团簇超材料在可见光频率范围内的磁共振现象。进行了大量的数值模拟研究以找到最佳的纳米团簇尺寸。然后，在通过激光干涉光刻制造的聚合物模板上进行涂覆有纳米级二氧化硅涂层的银纳米颗粒的自组装。这些纳米团簇在可见光区域支持磁共振，并且提取的有效磁导率呈现出类似洛伦兹的共振。实验观察到的磁导率实部的最低值为0.06。这种纳米团簇超材料代表了一种与可扩展的自下而上制造工艺兼容的实用超材料结构。
