Quantifying single plasmonic nanostructure far-fields with interferometric and polarimetric k-space microscopy  

作　　者：Ruslan Röhrich Chris Hoekmeijer Clara I.Osorio A.Femius Koenderink 

机构地区：[1]Center for Nanophotonics,AMOLF,Science Park 104,1098 XG Amsterdam,The Netherlands [2]ARCNL,Science Park 104,1098 XG Amsterdam,The Netherlands

出　　处：《Light(Science & Applications)》2018年第1期455-466,共12页光（科学与应用)（英文版）

摘　　要：Optically resonant nanoantennae are key building blocks for metasurfaces,nanosensors,and nanophotonic light sources due to their ability to control the amplitude,phase,directivity,and polarization of scattered light.Here,we report an experimental technique for the full recovery of all degrees of freedom encoded in the far-field radiated by a single nanostructure using a high-NA Fourier microscope equipped with digital off-axis holography.This method enables full decomposition of antenna-physics in its multipole contributions and gives full access to the orbital and spin angular momentum properties of light scattered by single nano-objects.Our results demonstrate these capabilities through a quantitative assessment of the purity of the“selection rules”for orbital angular momentum transfer by plasmonic spiral nanostructures.

关 键 词：SCATTERED ORBITAL MOMENTUM 

分 类 号：O57[理学—粒子物理与原子核物理]