| 5 | Suppressing meta-holographic artifacts by laser coherence tuning显示文摘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 suppress all artifacts by fine-tuning the spatial coherence of illumination.Our method is implemented with a degenerate cavity laser,which allows a precise and continuous tuning of the spatial coherence over a wide range,with little variation in the emission spectrum and total power.We find the optimal degree of spatial coherence to suppress the coherent artifacts of a meta-hologram while maintaining the image sharpness.This work paves the way to compact and dynamical holographic displays free of coherent defects. | Yaniv Eliezer Geyang Qu Wenhong Yang Yujie Wang Hasan Yılmaz Shumin Xiao Qinghai Song Hui Cao | 2021 | Light(Science & Applications)2021，10，7： | 0 |
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