Forestiere Carlo, Walsh Gary F, Miano Giovanni, Dal Negro Luca
Department of Electrical and Computer Engineering & Photonic Center, 8 Saint Mary's Street, Boston, MA 02215, USA.
Opt Express. 2009 Dec 21;17(26):24288-303. doi: 10.1364/OE.17.024288.
In this paper, we investigate the plasmonic near-field localization and the far-field scattering properties of non-periodic arrays of Ag nanoparticles generated by prime number sequences in two spatial dimensions. In particular, we demonstrate that the engineering of plasmonic arrays with large spectral flatness and particle density is necessary to achieve a high density of electromagnetic hot spots over a broader frequency range and a larger area compared to strongly coupled periodic and quasi-periodic structures. Finally, we study the far-field scattering properties of prime number arrays illuminated by plane waves and we discuss their angular scattering properties. The study of prime number arrays of metal nanoparticles provides a novel strategy to achieve broadband enhancement and localization of plasmonic fields for the engineering of nanoscale nano-antenna arrays and active plasmonic structures.
在本文中，我们研究了二维空间中由质数序列生成的银纳米颗粒非周期性阵列的表面等离激元近场局域化和远场散射特性。特别地，我们证明，与强耦合周期性和准周期性结构相比，设计具有大光谱平整度和粒子密度的表面等离激元阵列对于在更宽频率范围和更大面积上实现高密度电磁热点是必要的。最后，我们研究了平面波照射下质数阵列的远场散射特性，并讨论了它们的角散射特性。对金属纳米颗粒质数阵列的研究为纳米级纳米天线阵列和有源表面等离激元结构的工程设计提供了一种实现表面等离激元场宽带增强和局域化的新策略。
