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<p>Phosphor-based optical storage technologies have made significant strides in encoding and decoding processes, yet persistent challenges in flexible, multi-level storage remain. Here, we present a synergistic strategy that integrates up-conversion charging (UCC) with a photo-stimulated trap manipulation (PSTM) technique to address the challenges, demonstrated through the use of co-doped Mg<sub>3</sub>Y<sub>2</sub>Ge<sub>3</sub>O<sub>12</sub>:Pr<sup>3+</sup>,Yb<sup>3+</sup> storage phosphors. During the data recording phase, we employ a 450-nm laser that rapidly fills both shallow and deep traps via non-linear UCC, allowing for high-definition data recording in just 0.01 s. For retrieval, PSTM uniquely leverages ambient light to redistribute electrons from deep to shallow traps, followed by infrared-stimulated luminescence with a 960-nm flashlight to enhance data access. This UCC-PSTM synergy enables high-security, multi-level information retrieval following multi-channel data encoding, and supports numerous write/read cycles. These outcomes mark a meaningful step forward in the realm of optical storage technologies and pave the way for further developments in the field.</p>

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Multi-level phosphor storage enabled by synergistic up-conversion and photo-stimulated trap manipulation

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年7月19日

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  • Yuning Luan,
  • Quan Sun,
  • Yi Liu,
  • Tingxing Shi,
  • Feng Liu,
  • Liangliang Zhang,
  • Jiahua Zhang,
  • Xiao-jun Wang,
  • Yichun Liu

摘要

Phosphor-based optical storage technologies have made significant strides in encoding and decoding processes, yet persistent challenges in flexible, multi-level storage remain. Here, we present a synergistic strategy that integrates up-conversion charging (UCC) with a photo-stimulated trap manipulation (PSTM) technique to address the challenges, demonstrated through the use of co-doped Mg3Y2Ge3O12:Pr3+,Yb3+ storage phosphors. During the data recording phase, we employ a 450-nm laser that rapidly fills both shallow and deep traps via non-linear UCC, allowing for high-definition data recording in just 0.01 s. For retrieval, PSTM uniquely leverages ambient light to redistribute electrons from deep to shallow traps, followed by infrared-stimulated luminescence with a 960-nm flashlight to enhance data access. This UCC-PSTM synergy enables high-security, multi-level information retrieval following multi-channel data encoding, and supports numerous write/read cycles. These outcomes mark a meaningful step forward in the realm of optical storage technologies and pave the way for further developments in the field.