IMEC, Kapeldreef 75, Leuven, B-3001, Belgium.
ACS Nano. 2010 Mar 23;4(3):1457-64. doi: 10.1021/nn901519p.
The symmetry-broken geometry and variation of metal composition of semishells induce new plasmonic properties. A system of separated metallic semishells embedded in a poly(dimethylsiloxane) polymer film provides an ideal platform to investigate the localized surface plasmon resonance modes of semishells. We demonstrate experimentally that silver, gold, copper, and aluminum semishells can offer distinct plasmonic responses due to the wide range of their material parameters. Numerical calculations combined with the plasmon hybridization theory render us a clear understanding and assignment of the plasmonic modes of the semishells.
半壳的非对称几何形状和金属成分的变化导致了新的等离子体特性。嵌入在聚二甲基硅氧烷（PDMS）聚合物薄膜中的分离金属半壳系统为研究半壳的局域表面等离子体共振模式提供了理想的平台。我们通过实验证明，由于其材料参数的广泛范围，银、金、铜和铝半壳可以提供独特的等离子体响应。数值计算结合等离子体杂化理论使我们清楚地理解和分配了半壳的等离子体模式。
