Control of photo-induced voltages in plasmonic crystals via spin-orbit interactions.
Control of photo-induced voltages in plasmonic crystals via spin-orbit interactions.
复制标题
通过自旋轨道相互作用控制等离激元晶体中的光致电压。
DOI：
10.1364/oe.24.010402
复制
发表时间：
2015
期刊：
影响因子：
3.8
通讯作者：
L. Vuong
中科院分区：
文献类型：
--
作者：
N. Proscia;M. Moocarme;R. Chang;I. Kretzschmar;V. Menon;L. Vuong
人们对理解和利用纳米结构材料的非线性等离子体激元诱导势有着广泛的兴趣。我们研究了自旋偏振光穿过大面积自下而上组装的二维等离子体晶体产生的电响应。数值近似的洛伦兹力提供定量协议与我们的实验测量的直流电压。我们表明，自旋极化电压的基本机制是一个梯度力，产生于不对称的，时间平均的热点，其位置与光的手性转移。最后，我们正式的自旋轨道相互作用的作用，在移动的强度模式和显着推进我们的理解的物理现象，往往与光的自旋霍尔效应。
There is wide interest in understanding and leveraging the nonlinear plasmon-induced potentials of nanostructured materials. We investigate the electrical response produced by spin-polarized light across a large-area bottom-up assembled 2D plasmonic crystal. Numerical approximations of the Lorentz forces provide quantitative agreement with our experimentally-measured DC voltages. We show that the underlying mechanism of the spin-polarized voltages is a gradient force that arises from asymmetric, time-averaged hotspots, whose locations shift with the chirality of light. Finally, we formalize the role of spin-orbit interactions in the shifted intensity patterns and significantly advance our understanding of the physical phenomena, often related to the spin Hall effect of light.