Shabanpour Javad, Sedaghat Morteza, Nayyeri Vahid, Oraizi Homayoon, Ramahi Omar M
Opt Express. 2021 May 10;29(10):14525-14535. doi: 10.1364/OE.420972.
We propose a new generation of reprogrammable multi-functional bias encoded metasurfaces for dynamic wave manipulation using liquid crystals (LC). This metadevice is an array of unit-cells based on LCs to provide the desired phase steps based on its large birefringence property. The presented 3-bit coding metasurface (CM) use 8 states of "000"-"111" to control and manipulate the scattered wave at λ=1.4µm for several applications. The metasurface is introduced in detail and followed by several examples to show its versatility. Steered pencil, regular, and focused vortex beams with different topological charges are realized. The theoretical predictions are confirmed by numerical simulations. The proposed CM enables the realization of multifunctional optical wavefront manipulation and future intelligent optical devices.
我们提出了一种新一代的可重新编程的多功能偏置编码超表面，用于使用液晶（LC）进行动态波操纵。这种超器件是基于液晶的单元阵列，基于其大双折射特性提供所需的相位步长。所展示的3位编码超表面（CM）使用“000”-“111”的8种状态来控制和操纵波长为λ=1.4µm的散射波，以用于多种应用。详细介绍了该超表面，并通过几个例子展示了其多功能性。实现了具有不同拓扑电荷的可控铅笔波束、规则波束和聚焦涡旋波束。理论预测通过数值模拟得到了证实。所提出的CM能够实现多功能光波前操纵以及未来的智能光学器件。
