Cuccureddu Floriano, Murphy Shane, Shvets Igor V, Porcu Mauro, Zandbergen H W
Centre for Research on Adaptive Nanostructures and Nanodevices, School of Physics, Trinity College, Dublin 2, Ireland.
Nano Lett. 2008 Oct;8(10):3248-56. doi: 10.1021/nl801600w. Epub 2008 Sep 18.
The plasmonic properties of aligned silver nanoparticles grown by atomic terrace low-angle shadowing (ATLAS) were studied by optical transmission spectroscopy. ATLAS is a novel nanofabrication technique that combines the advantages of self-assembly with control of the nanostructure features. The silver nanoarrays were optically characterized and distinct optical responses with strong polarization dependence were obtained indicating the existence of a strong near-field coupling between the particles. We found that different morphologies gave rise to a similar optical response due to the local contributions to the overall response. Numerical model based on discrete dipole approximation was used to give a qualitative insight into the studied phenomena.
通过光透射光谱法研究了采用原子台阶低角度阴影法（ATLAS）生长的排列银纳米颗粒的等离子体特性。ATLAS是一种新型纳米制造技术，它将自组装的优点与纳米结构特征的控制相结合。对银纳米阵列进行了光学表征，并获得了具有强偏振依赖性的独特光学响应，这表明颗粒之间存在强近场耦合。我们发现，由于对整体响应的局部贡献，不同的形态产生了相似的光学响应。基于离散偶极近似的数值模型被用于对所研究的现象进行定性洞察。
