Twofold optical display and encryption of binary and grayscale images with a wavelength-multiplexed metasurface

Xiaoyi Zhang, Jiaqi Cheng, Wenjing Yue*, Zhancheng Li*, Duk Yong Choi, Yang Li, Hongliang Li, Sang Shin Lee, Shuqi Chen*, Song Gao*

*Corresponding author for this work

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