In this paper, we demonstrate analog phase modulation in a transmissive configuration using the flexoelectro-optic effect in short-pitch chiral nematic liquid crystal (LC) devices. Two different modes are considered, both of which are shown to generate full 2π phase modulation at 1 kHz switching frequency. The first configuration that is considered consists of a half-wave plate that is placed between two flexoelectro-optic LC devices that are subjected to electric fields that are applied in phase. Second, we demonstrate that a similar phase modulation response can be observed by removing the half-wave plate and subjecting the two flexoelectro-optic LC devices to electric fields whereby the polarities are out of phase. Both configurations demonstrated herein are promising for the development of next-generation LC spatial light modulators, particularly when reflective geometries are challenging or impractical.

中文翻译：

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具有2π调制的透射型柔性光电液晶相位调制器

在本文中，我们演示了在短间距手性向列液晶（LC）器件中使用挠性光电效应的透射配置中的模拟相位调制。考虑了两种不同的模式，两种模式均显示为以1 kHz的开关频率生成完整的2π相位调制。所考虑的第一种配置包括一个半波片，该半波片放置在两个柔性光电LC器件之间，该器件受到同相施加的电场的作用。其次，我们证明了通过移去半波片并使两个柔性光电LC器件受到极性相反的电场的影响，可以观察到相似的相位调制响应。本文演示的两种配置都有望用于下一代LC空间光调制器的开发，