Liquid crystal integrated metadevice for reconfigurable hologram displays and optical encryption

Shuangqi Zhu, Zhentao Xu, Hao Zhang, Keyang Yang, Ning Wang, Haitao Liu, Yongtian Wang, Jun Xia, Lingling Huang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

The ultimate goal of metasurface research in recent years is to apply metasurface to reality applications and improve the performance compared to its counterpart, namely conventional optical elements with the same function. Inspired by the application of electrically addressing spatial light modulator (EA-SLM) and based on the binary holographic algorithm, here we propose a reconfigurable metadevice integrated with the nematic liquid crystal (NLC). The smart metadevice directly uses the subwavelength antennas as the main contributor to the phase accumulation instead of the NLC layer. By applying different electrical modulation patterns on the NLC, the metadevice can realize the function of dynamic holographic display as traditional SLMs but features in smaller size, higher resolution and lager field of view. In addition, we improved the existing computer-generated hologram algorithm to generate three holograms with quantitative correlation and also propose a new optical encryption method based on our metadevice. The encryption method needs four elements in total to decrypt and can fully meets the requirements of the various encrypted content. We believe such metadevice paves the way for the new generation of micro-optical display and optical encryption devices.

Original languageEnglish
Pages (from-to)9553-9564
Number of pages12
JournalOptics Express
Volume29
Issue number6
DOIs
Publication statusPublished - 15 Mar 2021

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