近日，中国科学院上海光学精密机械研究所的阮昊及其研究小组与上海理工大学的顾敏等人合作并取得一项新进展。经过不懈努力，他们开出发具有pb容量的3D纳米级光盘存储器。相关研究成果已于2024年2月21日在国际权威学术期刊《自然》上发表。

据悉，为了满足日益增长的数据需求，需要大容量存储技术。然而，基于半导体闪存设备和硬盘驱动器等主要存储技术的数据中心存在能量负担高、运行成本高、寿命短等问题。光数据存储(ODS)是一种具有成本效益的长期档案数据存储技术。尽管如此，臭氧耗散剂受到其容量低和增加其面密度的挑战的限制。

为了解决这些问题，研究人员通过将平面记录架构扩展到数百层的三维空间，同时打破记录点的光学衍射极限屏障，将ODS的容量提高到pb级。研究人员开发了一种基于掺有聚集致发射染料的光刻胶薄膜的光学记录介质，该介质可以被飞秒激光束光激发。该薄膜具有高透明度和均匀性，聚集诱导发射现象提供了储存机制。它也可以被另一个失活光束抑制，从而产生一个具有超分辨率刻度的记录点。这项技术使得通过将纳米级磁盘堆叠成阵列来实现eb级存储成为可能，这在空间有限的大数据中心至关重要。

附：英文原文

Title: A 3D nanoscale optical disk memory with petabit capacity

Author: Zhao, Miao, Wen, Jing, Hu, Qiao, Wei, Xunbin, Zhong, Yu-Wu, Ruan, Hao, Gu, Min

Issue&Volume: 2024-02-21

Abstract: High-capacity storage technologies are needed to meet our ever-growing data demands. However, data centres based on major storage technologies such as semiconductor flash devices and hard disk drives have high energy burdens, high operation costs and short lifespans. Optical data storage (ODS) presents a promising solution for cost-effective long-term archival data storage. Nonetheless, ODS has been limited by its low capacity and the challenge of increasing its areal density. Here, to address these issues, we increase the capacity of ODS to the petabit level by extending the planar recording architecture to three dimensions with hundreds of layers, meanwhile breaking the optical diffraction limit barrier of the recorded spots. We develop an optical recording medium based on a photoresist film doped with aggregation-induced emission dye, which can be optically stimulated by femtosecond laser beams. This film is highly transparent and uniform, and the aggregation-induced emission phenomenon provides the storage mechanism. It can also be inhibited by another deactivating beam, resulting in a recording spot with a super-resolution scale. This technology makes it possible to achieve exabit-level storage by stacking nanoscale disks into arrays, which is essential in big data centres with limited space.

DOI: 10.1038/s41586-023-06980-y

Source: https://www.nature.com/articles/s41586-023-06980-y