在当今信息爆炸的时代，数据存储技术的发展至关重要。传统的利用磷光体介质的光存储技术，在使用可见光或红外光进行快速、精确的数据记录时面临诸多挑战，这主要是因为传统的充电技术存在限制。最近，科学家们提出了一种名为上转换充电（UCC）的前沿方法来解决这些问题。研究聚焦于存储磷光体中UCC独特的两步电离和非线性充电特性，以镓酸盐成分Gd₃Ga₅O₁₂:Cr³⁺为例。这种技术十分厉害，它能实现高分辨率的数据存储。当使用配备可见光发光二极管激光器的便携式激光雕刻机时，每一位数据的写入仅需0.01秒的曝光时间。UCC方法不仅提高了记录效率，还能确保数据的长期保存，并且具有出色的可重写性。通过热致和光致发光现象，研究还展示了UCC存储在各种材料系统中的通用性。这一成果表明，UCC方法在推动光存储应用方面具有变革性的潜力，为信息存储解决方案的发展带来了显著的提升。

期刊

Light: Science & Applications

标题

Unlocking the potential of up-conversion charging for rapid and high-resolution optical storage with phosphors

作者

Lu Chen, Xueqing Liu, Feng Liu, Chuan Liao, Liangliang Zhang, Jiahua Zhang, Xiao-jun Wang & Yichun Liu

摘要

Current optical storage technologies utilizing phosphor media face challenges in achieving rapid and precise data recording with visible or infrared light, primarily due to the constraints of traditional charging techniques. Here, we introduce a cutting-edge method termed up-conversion charging (UCC) to address these challenges, enabling rapid and high-resolution data storage in phosphors. Our study focuses on the unique two-step ionization and non-linear charging characteristics of UCC in storage phosphors, specifically in a gallate composition Gd3Ga5O12:Cr3+. Remarkably, this technique enables data writing with high solution, requiring only 0.01 s of exposure per bit when utilizing a portable laser engraver equipped with visible-emitting diode lasers. The present strategy not only enhances recording efficiency but also ensures long-term data retention and superior rewritability. Moreover, we illustrate the versatility of UCC storage across various material systems through thermally- and optically-stimulated luminescence. Our outcomes highlight the transformative potential of the UCC method in advancing optical storage applications, offering significant improvements in the development of information storage solutions.

原文链接

https://www.nature.com/articles/s41377-025-01746-9

https://mp.weixin.qq.com/s/hehfAM-znWpeas41DnHPtg

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