Xu Daming, Tan Guanjun, Wu Shin-Tson
Opt Express. 2015 May 4;23(9):12274-85. doi: 10.1364/OE.23.012274.
We propose a switchable phase grating using fringe field switching (FFS) cells. The FFS phase grating possesses several attractive features: large diffraction angle, high diffraction efficiency, fast response time, and high contrast ratio. It can diffract >32% light to ± 2nd orders with a large diffraction angle of 12.1°. Meanwhile, its response time remains relatively fast even at -40°C. A simulation model is developed to explain the experimental results and good agreement is obtained. We also demonstrate a blazed phase grating to achieve tunable beam steering between 0th, 1st and 2nd orders.
我们提出了一种使用边缘场切换（FFS）单元的可切换相位光栅。该FFS相位光栅具有几个吸引人的特性：大衍射角、高衍射效率、快速响应时间和高对比度。它可以将超过32%的光衍射到±二级，衍射角为12.1°。同时，即使在-40°C时其响应时间仍保持相对较快。开发了一个模拟模型来解释实验结果，并获得了良好的一致性。我们还展示了一种闪耀相位光栅，以实现零级、一级和二级之间的可调光束转向。
