Wavefront shaping, which is often achieved using liquid crystal (LC) spatial light modulators, is particularly important for a wide range of applications including laser microfabrication and micromanipulation, microscopy, and quantum optics. In this work, results are presented for the first integrated LC phase modulator that combines a flexoelectro‐optic LC layer (that behaves as a switchable λ/2 waveplate) with a polymerized reactive mesogen layer (which acts as a λ/4 waveplate) and a mirrored substrate that creates a double‐pass geometry. For a flexoelectro‐optic LC layer that exhibits switching angles of ±45° at a voltage of ±85 V a full 2π phase modulation is observed when driven by a 1 kHz waveform. Experimental results are also compared with modeling using Jones calculus of the amplitude and phase variation when the LC and the polymer layer deviate from their desired waveplate conditions. The development and demonstration of an integrated device is particularly significant for applications where size and cost are critical factors such as in LiDAR for the Space and Automotive industries, respectively.

中文翻译：

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紧凑的全2π柔性光电液晶相位调制器

波前整形通常使用液晶（LC）空间光调制器来实现，对于包括激光微加工和微操纵，显微镜和量子光学在内的广泛应用而言，这一点尤为重要。在这项工作中，提出了第一个集成LC相位调制器的结果，该调制器将柔性光电LC层（表现为可切换的λ/ 2波片）与聚合的反应性液晶元（充当λ/ 4波片）结合在一起，并且创建双通道几何图形的镜面基板。对于在±85 V的电压下显示±45°开关角的柔性光电LC层，当以1 kHz波形驱动时，会观察到完整的2π相位调制。当LC和聚合物层偏离其所需的波片条件时，还将实验结果与使用Jones演算进行的振幅和相位变化建模进行比较。集成设备的开发和演示对于尺寸和成本至关重要的应用尤其重要，例如分别在航天和汽车行业的LiDAR中。