Directional control over optical near‐fields using plasmonic structure is highly desirable for the realization of photonic nanocircuitry. A simple plasmonic nanostructure is designed to allow polarization‐sensitive directional launching and steering of surface plasmon polaritons (SPPs). In the past, polarization‐controlled SPP steering has been limited to wavelength demultiplexing that severely limits the realization of multiple output SPP‐based circuits excited by a monochromatic source. Based on crossed Babinet‐inverted nanoantennas, steering of SPPs in the first quadrant with very high sensitivity to the linear polarization of the exciting source is numerically and experimentally demonstrated. The same device also functions as a power‐splitter under a particular optical polarization. The results of this study can open up a new avenue towards full coherent control of SPPs and should accelerate the pace for the realization of highly functioning next‐generation optical nanocircuits.

中文翻译：

---

使用交叉互易的纳米天线对表面等离激元进行极化控制。

对于实现光子纳米电路，非常需要使用等离激元结构对光学近场进行方向控制。设计了一个简单的等离激元纳米结构，以允许对极化敏感的方向发射和操纵表面等离激元极化子（SPPs）。过去，偏振控制的SPP操纵仅限于波长解复用，这严重限制了单色源激发的基于多输出SPP的电路的实现。基于交叉的巴比涅倒置纳米天线，通过数值和实验证明了对第一象限中对激发源线性极化具有很高灵敏度的SPP操纵。在特定的光偏振下，同一设备还可以用作功率分配器。