IMM-Instituto de Microelectrónica de Madrid (CNM-CSIC) , Isaac Newton 8, PTM, E-28760 Tres Cantos, Madrid, Spain.
Nano Lett. 2014;14(4):2079-85. doi: 10.1021/nl500238h. Epub 2014 Mar 26.
In this work we discuss the excitation of parallel collective resonances in arrays of gold nanoparticles. Parallel collective resonances result from the coupling of the nanoparticles localized surface plasmons with diffraction orders traveling in the direction parallel to the polarization vector. While they provide field enhancement and delocalization as the standard collective resonances, our results suggest that parallel resonances could exhibit greater tolerance to index asymmetry in the environment surrounding the arrays. The near- and far-field properties of these resonances are analyzed, both experimentally and numerically.
在这项工作中，我们讨论了金纳米粒子阵列中平行集体共振的激发。平行集体共振源于纳米粒子局域表面等离激元与沿偏振矢量方向传播的衍射级之间的耦合。虽然它们提供了与标准集体共振相同的场增强和离域化效果，但我们的结果表明，平行共振可能对周围环境的折射率不对称具有更大的容忍度。这些共振的近场和远场特性都进行了实验和数值分析。
