用于光的轨道angular momentum的液晶空间模式转换器
Liquid crystal spatial-mode converters for the orbital angular momentum of light
摘要:
我们提出了一种可调液晶器件,它可以将光束的纯轨道角动量本征模转换为等权重的反手本征模叠加,反之亦然。对于特定的输入状态,该装置因此可以模拟给定的二维轨道角动量子空间中的π/2相位延迟器的行为,类似于用于光学偏振的四分之一波片。相同器件的变体从高斯输入开始生成相同的最终模式。
英文摘要:
We present a tunable liquid crystal device that converts pure orbital angular momentum eigenmodes of a light beam into equal-weight superpositions of opposite-handed eigenmodes and vice versa. For specific input states, the device may thus simulate the behavior of a π/2 phase retarder in a given two-dimensional orbital angular momentum subspace, analogous to a quarter-wave plate for optical polarization. A variant of the same device generates the same final modes starting from a Gaussian input.
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