Tri-channel metasurface for watermarked structural-color nanoprinting and holographic imaging

Zhao, Naixuan; Li, Zile; Zhu, Guodong; Li, Jiaxin; Deng, Liya; Dai, Qi; Zhang, Weiguo; He, Zhixue; Zheng, Guoxing

doi:10.1364/oe.472789

Cited by 3 publications

(2 citation statements)

References 56 publications

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“…Unlocking the brightness dimension in metasurface‐based holography can significantly improve the chiaroscuro of full‐color images by making them more vivid and realistic. [ 115 ]…”

Section: Optical Manipulation In Polarization‐based Multidimensionsmentioning

confidence: 99%

Design Strategies and Applications of Dimensional Optical Field Manipulation Based on Metasurfaces

Liu

Ansari

et al. 2023

Advanced Materials

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Recent rapid progress in metasurfaces is underpinned by the physics of local and nonlocal resonances and the modes coupling among them, leading to tremendous applications such as optical switching, information transmission, and sensing. In this review paper, an overview of the recent advances in a broad range of dimensional optical field manipulation based on metasurfaces categorized into different classes based on design strategies is provided. This review starts from the near‐field optical resonances of artificial nanostructures and discusses the far‐field optical wave manipulation based on fundamental mechanisms such as mode generation and mode coupling. The recent advances in optical field manipulation based on metasurfaces in different optical dimensions such as phase and polarization are summarized, and newly‐developed dimensions such as the orbital angular momentum and the coherence dimensions resulting from phase modulation are discussed. Then, the recent achievements of multiplexing and multifunctional metasurfaces empowered by multidimensional optical field manipulation for optical information transmission and integrated applications are reviewed. Finally, the paper concludes with a few perspectives on emerging trends, possible directions, and existing challenges in this fast‐developing field.

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“…Unlocking the brightness dimension in metasurface‐based holography can significantly improve the chiaroscuro of full‐color images by making them more vivid and realistic. [ 115 ]…”

Section: Optical Manipulation In Polarization‐based Multidimensionsmentioning

confidence: 99%

Design Strategies and Applications of Dimensional Optical Field Manipulation Based on Metasurfaces

Liu

Ansari

et al. 2023

Advanced Materials

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“…In particular, attaching multiple information to different polarization channels has aroused wide concern. These multichannel applications are commonly implemented by few-layer [24,25] or polyatomic [26,27] metasurfaces, which require complex sample fabrication processes. Due to the orientation degeneracy and continuous amplitude modulation of Malus's law, Malus metasurfaces are capable of encoding versatile information into multiple different channels using only single-sized structures, dramatically simplifying the fabrication process and reducing the crosstalk between different channels.…”

Section: Introductionmentioning

confidence: 99%

Multichannel Linear and Nonlinear Information Encryptions with Malus Metasurfaces

Sun,

Geng,

Wang

et al. 2024

Laser & Photonics Reviews

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The superior capability of wavefront manipulation makes metasurfaces a promising platform for implementing high‐density information storage and multifold optical encryption. Although some metasurfaces have realized information encryption, it is still challenging to implement polarization‐encrypted grayscale images in both linear and nonlinear channels. Here, a novel approach to realize multichannel linear and nonlinear information encryptions is proposed based on nonlinear Malus metasurfaces composed of single‐sized meta‐atoms, in which the polarization states of the linear and nonlinear signals can be decoupled. As a proof of concept, two distinct grayscale images with different polarizations have been encrypted in the fundamental and second harmonic wave channels simultaneously. Besides, by further introducing the nonlinear Pancharatnam‐Berry phase, a tri‐channel polarization encrypted metasurface with a multi‐level grayscale image in the near field and two holographic images in the far field has been experimentally demonstrated at the second harmonic frequency. This work provides more degrees of freedom for multichannel information storage and opens an avenue for optical information encryption in both linear and nonlinear regimes.

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Optical image watermarking based on orbital angular momentum holography

Zhu 朱,

Ji 季,

Wang 王

et al. 2024

Chinese Phys. B

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In this paper, we propose an optical image watermarking scheme based on orbital angular momentum (OAM) holography. Multiple topological charges (TCs, l) of OAM, as multiple cryptographic sub-keys, are embedded into the host image along with the watermark information. Moreover, the Arnold transformation is employed to further enhance the security and the scrambling time (m) is also served as another cryptographic key. The watermark image is embedded into the host image by using the discrete wavelet transformation (DWT) and singular value decomposition (SVD) methods. Importantly, the interference image is utilized to further enhance security. The imperceptibility of our proposed method is analyzed by using the Peak Signalto-Noise Ratio (PSNR) and the histogram of the watermarked host image. To demonstrate robustness, a series of attack tests, including Gaussian noise, Poisson noise, salt-and-pepper noise, JPEG compression, Gaussian low-pass filtering, cropping, and rotation, are conducted. The experimental results show that our proposed method has advanced security, imperceptibility, and robustness, making it a promising option for optical image watermarking applications.

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Tri-channel metasurface for watermarked structural-color nanoprinting and holographic imaging

Cited by 3 publications

References 56 publications

Design Strategies and Applications of Dimensional Optical Field Manipulation Based on Metasurfaces

Design Strategies and Applications of Dimensional Optical Field Manipulation Based on Metasurfaces

Multichannel Linear and Nonlinear Information Encryptions with Malus Metasurfaces

Optical image watermarking based on orbital angular momentum holography

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