基于高正交性随机超表面信道的杂化层光存储

赵东, 连泓坤, 康学亮, 黄坤

工程（英文） ›› 2025, Vol. 45 ›› Issue (2) : 79-87.

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PDF(3138 KB)
工程（英文） ›› 2025, Vol. 45 ›› Issue (2) : 79-87. DOI: 10.1016/j.eng.2024.10.014
研究论文
Article

基于高正交性随机超表面信道的杂化层光存储

作者信息 +

Hybrid-Layer Data Storage with High-Orthogonality Random Meta-Channels

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摘要

光学数据存储（Optical data storage，ODS）是传统电子或磁性存储的低成本、高耐久性的替代方案。多层记录（Multiple recording layer，MRL）方法作为增强ODS容量的一种常用手段，比其他方法如减少记录体积和多路复用技术更具前景。然而，当前MRL的架构与将数据记录到具有实际空间体积的物理层中相同，这也导致了严重的层间串扰或有限的记录层数（受限于物镜的短工作距离）。在此，我们提出了杂化层ODS的概念：通过使用高正交性随机通道，将光学信息同时记录到单个物理层和多个虚拟层中。在虚拟层中，通过计算全息重建了32幅图像，其中它们的全息相位被编码到物理层中的16幅打印图像和其互补图像中，共实现了2.5 Tbit·cm−3的存储密度。增加更多的虚拟层数可实现更高的存储容量，这表明杂化层ODS方法有望成为下一代ODS的候选方案。

Abstract

Optical data storage (ODS) is a low-cost and high-durability counterpart of traditional electronic or magnetic storage. As a means of enhancing ODS capacity, the multiple recording layer (MRL) method is more promising than other approaches such as reducing the recording volume and multiplexing technology. However, the architecture of current MRLs is identical to that of recording data into physical layers with rigid space, which leads to either severe interlayer crosstalk or finite recording layers constrained by the short working distances of the objectives. Here, we propose the concept of hybrid-layer ODS, which can record optical information into a physical layer and multiple virtual layers by using high-orthogonality random meta-channels. In the virtual layer, 32 images are experimentally reconstructed through holography, where their holographic phases are encoded into 16 printed images and complementary images in the physical layer, yielding a capacity of 2.5 Tbit·cm−3. A higher capacity is achievable with more virtual layers, suggesting hybrid-layer ODS as a possible candidate for next-generation ODS.

关键词

光学数据存储 / 超表面 / 高正交性通道 / 物理层 / 虚拟层

Keywords

Optical data storage / Metasurfaces / High-orthogonality meta-channels / Physical layer / Virtual layer

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赵东, 连泓坤, 康学亮. 基于高正交性随机超表面信道的杂化层光存储. Engineering. 2025, 45(2): 79-87 https://doi.org/10.1016/j.eng.2024.10.014

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