Department of Electrical and Computer Engineering, K N Toosi University of Technology, Tehran, Iran.
Opt Lett. 2012 Feb 15;37(4):527-9. doi: 10.1364/OL.37.000527.
In this numerical study, we present and demonstrate a compact, electrical plasmonic beam-steering device composed of anisotropic material. The splitting angle can be modulated by the external electric or magnetic field. The physical principle of this phenomenon is evaluated from the phase of surface plasmon polaritons and Fabry-Perot (F-P) resonance in slits. Our numerical simulations with finite-difference time-domain (FDTD) technique reveals that wide-angle (±27°) beam steering can be achieved. Moreover, the efficiency increases when increasing the steering angle. A special characteristic of the presented structure gives an opportunity to be used as an efficient element in a high integrated optical device for miniaturization and tuning purposes.
在这项数值研究中，我们提出并展示了一种由各向异性材料组成的紧凑、电浆子光束转向装置。分裂角可以通过外部电场或磁场来调制。这种现象的物理原理可以通过表面等离激元的相位和狭缝中的法布里-珀罗（F-P）共振来评估。我们使用有限时域差分（FDTD）技术的数值模拟表明，可以实现大角度（±27°）的光束转向。此外，当转向角度增加时，效率也会提高。所提出结构的一个特殊特性为在用于小型化和调谐目的的高集成光学器件中作为有效元件提供了机会。
