Spin-Decoupled Transflective Spatial Light Modulations Enabled by a Piecewise-Twisted Anisotropic Monolayer.
Spin-Decoupled Transflective Spatial Light Modulations Enabled by a Piecewise-Twisted Anisotropic Monolayer.
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通过分段扭曲的各向异性单层启用了自旋耦合的传播空间光调制。
DOI：
10.1002/advs.202202424
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发表时间：
2022-08
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波前控制是现代光学的核心。具有专门定制的谐振器的超表面可以将不同的相位编码为两个正交偏振分量，但受到波长相关效率，复杂制造和尺寸限制的影响。液晶是平面光学的另一个优秀候选者，它仅限于自旋耦合共轭相位调制。具有自旋解耦功能的平面光学有望释放现代光学的多功能性。本文提出了一种具有分段扭曲各向异性单层的自旋解耦透反射空间光调制器。反射光和透射光的相位可以分别通过预先编程周期性螺旋和镜面对称双扭曲结构的初始方向来独立定制。介绍了一种可同时兼容不同复用技术的轨道角动量编码器和解码器。这项工作释放了先进平面光学的多功能性，并可能升级现有的光学信息学设备。提出了一种具有分段扭曲各向异性单层的自旋解耦透反射空间光调制器。反射光和透射光的相位可以分别通过预先编程周期性螺旋和镜面对称双扭曲结构的初始方向来独立定制。这项工作释放了先进平面光学的多功能性，并可能升级现有的光学信息学设备。
Wavefront control lies at the heart of modern optics. Metasurfaces with specifically tailored resonators can encode different phases to two orthogonal polarization components, but suffer from wavelength‐dependent efficiency, sophisticated fabrication, and limited size. Liquid crystals, another excellent candidate for planar optics, are restricted to spin‐coupled conjugated phase modulations. Planar optics with spin‐decoupled functions is expected to release the multifunctionality of modern optics. Here, a spin‐decoupled transflective spatial light modulator is presented with a piecewise‐twisted anisotropic monolayer. The phases of reflected and transmitted light can be independently customized by preprogramming the initial orientations of the periodic helix and mirror‐symmetric dual‐twist configuration, respectively. A transflective orbital angular momentum encoder and decoder is demonstrated, which is simultaneously compatible with different multiplexing techniques. This work releases the multifunctionality of advanced planar optics and may upgrade existing devices in optical informatics. A spin‐decoupled transflective spatial light modulator is presented with a piecewise‐twisted anisotropic monolayer. The phases of reflected and transmitted light can be independently customized by preprogramming the initial orientations of the periodic helix and mirror‐symmetric dual‐twist configuration, respectively. This work releases the multifunctionality of advanced planar optics and may upgrade existing devices in optical informatics.