Enhanced Light Focusing in Self-Assembled Optoplasmonic Clusters with Subwavelength Dimensions
Enhanced Light Focusing in Self-Assembled Optoplasmonic Clusters with Subwavelength Dimensions
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DOI：
10.1002/adma.201202830
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发表时间：
2013-01-04
影响因子：
29.4
通讯作者：
Reinhard, Bjoern M.
中科院分区：
文献类型：
--
作者：
Hong, Yan;Pourmand, Mahshid;Reinhard, Bjoern M.
采用模板引导自组装技术制备了致密的亚波长金属-介电混合团簇。弹性和非弹性散射光谱和电磁模拟表明，在强耦合的金纳米粒子簇的顶部包含二氧化钛纳米粒子的混合簇利用了构建块之间的协同电磁相互作用。这导致峰值电场强度的增加和环境介质中的场的重新分布。星系团中复杂的位相景观以增强磁场的光学涡旋为特征。
Compact metallo-dielectric hybrid clusters with subwavelength dimensions are fabricated by template guided self-assembly. Elastic and inelastic scattering spectroscopy and electromagnetic simulations reveal that hybrid clusters comprising TiO2 nanoparticles on top of a cluster of strongly coupled gold nanoparticles harness synergistic electromagnetic interactions between the building blocks. This results in a boost of the peak electric field intensity and a redistribution of the field in the ambient medium. The complex phase landscape in the clusters features optical vortices that enhance the magnetic field.