Correlated 3D Nanoscale Mapping and Simulation of Coupled Plasmonic Nanoparticles.
Correlated 3D Nanoscale Mapping and Simulation of Coupled Plasmonic Nanoparticles.
复制标题
DOI：
10.1021/acs.nanolett.5b03780
复制
发表时间：
2015-11-11
期刊：
影响因子：
10.8
通讯作者：
Kothleitner G
中科院分区：
文献类型：
--
作者：
Haberfehlner G;Trügler A;Schmidt FP;Hörl A;Hofer F;Hohenester U;Kothleitner G
结合电子能量损失谱（EELS）的实验和模拟的电子断层扫描被用来解开结构和等离子体特性之间的相互作用的银纳米立方体二聚体。通过电子束光刻制造的粒子的精确的3D几何形状通过电子断层扫描重建，并使用完整的三维信息作为能量损失谱和等离子体共振图模拟的输入。实验和理论之间的良好协议被发现在整个，使EELS成像和模拟之间的比较定量和相关的水平。此外，界面模式模式，通常掩盖了透射显微镜调查的投影性质，可以明确地确定通过断层重建。这项工作克服了在模拟中对样品的几何假设或对称性限制的需要，并为详细研究现实和复杂的等离子体纳米结构铺平了道路。
Electron tomography in combination with electron energy-loss spectroscopy (EELS) experiments and simulations was used to unravel the interplay between structure and plasmonic properties of a silver nanocuboid dimer. The precise 3D geometry of the particles fabricated by means of electron beam lithography was reconstructed through electron tomography, and the full three-dimensional information was used as an input for simulations of energy-loss spectra and plasmon resonance maps. Excellent agreement between experiment and theory was found throughout, bringing the comparison between EELS imaging and simulations to a quantitative and correlative level. In addition, interface mode patterns, normally masked by the projection nature of a transmission microscopy investigation, could be unambiguously identified through tomographic reconstruction. This work overcomes the need for geometrical assumptions or symmetry restrictions of the sample in simulations and paves the way for detailed investigations of realistic and complex plasmonic nanostructures.