Immersion‐Triggered Switchable Quasi‐BIC with Optical Encryption from 1.5D Metagratings

Tang, Jiao; Dai, Chenjie; Shi, Yangyang; Wan, Shanhong; Li, Zhongyang

doi:10.1002/adfm.202304666

Cited by 6 publications

(1 citation statement)

References 44 publications

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“…However, heading toward next-generation wearable smart optical display meta-devices, most previous on-chip metasurfaces mainly remain static and lack practical dynamic control capability, significantly restricting their broad implementation in actual scenes. Despite that previous active tuning strategies based on thermal, , mechanical, , liquid immersion, − optical, − and electrical − schemes have been investigated for manipulating free-space light, a practically accessible tuning solution remains unveiled to achieve dynamic functionality for on-chip meta-optics. On the other hand, although some on-chip integrated metasurfaces have enabled guided wave-driven meta-holographic displays, they suffer from limited numbers of available polarization states in addition to the complicated nanostructure design with varying dimensions, which hinders their versatility in practical applications.…”

Section: Introductionmentioning

confidence: 99%

Electrical-Driven Dynamic Augmented Reality by On-Chip Vectorial Meta-Display

Shi,

Dai,

Wan

et al. 2024

ACS Photonics

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Waveguide-integrated on-chip meta-optics exhibit a promising platform for achieving high-performance and compact optical display devices. However, heading toward advanced wearable smart display technology, its broad implementation is critically restricted by the lack of practical active tuning capability. Despite previous endeavors, on-chip meta-optics still face crucial challenges in achieving any arbitrary vectorial wavefront with dynamic switchable ability. Here, a practical liquid crystal (LC)driven on-chip metasurface integrated on a waveguide is proposed and demonstrated for dynamic vectorial augmented reality (AR) meta-holograms. By engineering the on-chip meta-diatoms at the nanoscale, the simultaneous modulation of arbitrary polarization and phase of the out-coupling lightwave can be achieved for up to nine-channel fully polarized vectorial meta-holograms. As a proof of concept, in combination with an electrical-driven LC tuning platform, integrated on-chip meta-optics can actively switch holographic images floating in the actual-world scene in real-time as dynamic AR meta-displays. Moreover, owing to the on-chip optical propagation scheme, the projected AR holograms are uniquely free from zero-order diffraction interference. It is envisioned that such on-chip dynamic vectorial meta-displays integrated with the LC platform allow for miniaturized integration and promise potential applications in advanced intelligent dynamic displays, multiplexing information storage/encryption, and next-generation wearable AR displays.

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Section: Introductionmentioning

confidence: 99%

Electrical-Driven Dynamic Augmented Reality by On-Chip Vectorial Meta-Display

Shi,

Dai,

Wan

et al. 2024

ACS Photonics

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Computational Imaging Encryption with Steganography and Lanthanide Luminescent Materials

Lu,

Xie,

et al. 2024

Laser & Photonics Reviews

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Optical encryption is a potential scheme for information security that exploits abundant degrees of freedom of light to encode information. However, conventional encryption based on fluorescent materials faces challenges in handling complex secret information. Alternatively, single‐pixel imaging (SPI) provides a computational modality to solve these problems. In this study, a high‐capacity fluorescence encryption scheme, achieved by introducing lanthanide materials and steganography into the encoding and decoding processes of SPI is proposed. Two types of well‐designed lanthanide luminescent materials are utilized and excited to generate fluorescence images (fluo‐images), which are crucial in this scheme. Various practical experiments using fluo‐images as secret keys demonstrate the robustness, effectiveness, and repeatability of this scheme. Furthermore, multi‐image experiments indicate the potential of this method to increase secret information capacity. Thus, the proposed fluorescence encryption scheme does provide an efficient computational encryption strategy based on lanthanide luminescent materials for information security, which can improve the security of traditional optical encryption and simultaneously enhance the flexibility of SPI computational decryption.

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Dynamic switch between BIC and quasi-BIC supported by the electro-optic metasurface

Tian,

Li,

et al. 2025

Optics Communications

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Immersion‐Triggered Switchable Quasi‐BIC with Optical Encryption from 1.5D Metagratings

Cited by 6 publications

References 44 publications

Electrical-Driven Dynamic Augmented Reality by On-Chip Vectorial Meta-Display

Electrical-Driven Dynamic Augmented Reality by On-Chip Vectorial Meta-Display

Computational Imaging Encryption with Steganography and Lanthanide Luminescent Materials

Dynamic switch between BIC and quasi-BIC supported by the electro-optic metasurface

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