论文标题
通过激光相干调整抑制元数据
Suppressing meta-holographic artifacts by laser coherence tuning
论文作者
论文摘要
跨表面全息图结合了良好的空间分辨率和较大的视角与平面外形和紧凑的大小。然而，它遭受了源自密切包装的元原子和纳米级特征的制造缺陷之间的电磁串扰的连贯伪像。在这里，我们介绍了一种有效的方法来通过微调照明的空间连贯性来消除所有工件。我们的方法是通过退化的腔激光器实现的，该激光器可以在较大范围内进行精确的，连续调整空间连贯性，而发射光谱和总功率的变化很小。我们发现空间连贯性的最佳程度可以消除元数据的相干伪像，同时保持图像清晰度。这项工作为无连贯缺陷的紧凑和动态全息显示铺平了道路。
A metasurface hologram combines fine spatial resolution and large viewing angles with a planar form factor and compact size. However, it suffers coherent artifacts originating from electromagnetic cross-talk between closely packed meta-atoms and fabrication defects of nanoscale features. Here, we introduce an efficient method to remove all artifacts by fine-tuning the spatial coherence of illumination. Our method is implemented with a degenerate cavity laser, which allows precise, continuous tuning of spatial coherence over a wide range with little variation in emission spectrum and total power. We find the optimal degree of spatial coherence to remove the coherent artifacts of a meta-hologram while maintaining the image sharpness. This work paves the way to compact and dynamical holographic display free of coherent defects.
