Observation of Optical Spin Symmetry Breaking in Nanoapertures
Observation of Optical Spin Symmetry Breaking in Nanoapertures
复制标题
DOI：
10.1021/nl901437d
复制
发表时间：
2009-08-01
期刊：
影响因子：
10.8
通讯作者：
Hasman, Erez
中科院分区：
文献类型：
--
作者：
Gorodetski, Yuri;Shitrit, Nir;Hasman, Erez
观察到等离子体纳米尺度结构中由于自旋-轨道相互作用而产生的自旋对称性破缺效应。我们展示了一种纳米等离子体结构，它显示了角动量(AM)选择规则在光-表面等离子激元散射过程中的关键作用。在我们的实验中，入射辐射的本征AM(自旋)通过自旋-轨道相互作用耦合到表面等离子体的外动量(轨道AM)。由于这一效应，我们通过同轴纳米孔实现了自旋控制的增强传输。
Observation of a spin symmetry breaking effect in plasmonic nanoscale structures due to spin-orbit interaction is presented. We demonstrate a nanoplasmonic structure which exhibits a crucial role of an angular momentum (AM) selection rule in a light-surface plasmon scattering process. In our experiment, the intrinsic AM (spin) of the incident radiation is coupled to the extrinsic momentum (orbital AM) of the surface plasmons via spin-orbit interaction. Due to this effect, we achieved a spin-controlled enhanced transmission through a coaxial nanoaperture.