Ye Minxin, Lei Yuhao, Zhang Xin, Wang Lei, Chen Shih-Chi
Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong.
State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China.
Sci Adv. 2025 Jul 18;11(29):eadx7335. doi: 10.1126/sciadv.adx7335. Epub 2025 Jul 16.
Multidimensional optical data storage is a critically needed technology in the digital era. To overcome the low data writing rate in the conventional systems, we present a parallel five-dimensional optical data writing method by projecting arrays of depth-resolved voxels of different shapes via a digital micromirror device and temporally focusing a femtosecond laser amplifier. This is more efficient than the conventional approach that serially creates birefringent voxels in glass (e.g., nanogratings or oblate nanopores) via scanning an ultrafast laser while varying its polarizations. We demonstrated parallel writing of 16 by 16 birefringent voxels with eight different slow-axis azimuths by controlling the shapes of the projected light spots. Next, we demonstrated five-layer parallel data writing with 100% readout accuracy and a 1.5-terabyte storage capacity per disc. With a high repetition rate femtosecond laser amplifier (e.g., 100 kilohertz), our method may achieve a theoretical writing speed of 7.5 megabytes per second, paving the way for high-speed, high-capacity optical data storage.
多维光学数据存储是数字时代迫切需要的技术。为了克服传统系统中低数据写入速率的问题，我们提出了一种并行五维光学数据写入方法，该方法通过数字微镜器件投射不同形状的深度分辨体素阵列，并对飞秒激光放大器进行时间聚焦。这比传统方法更高效，传统方法是通过扫描超快激光并改变其偏振，在玻璃中（例如，纳米光栅或扁球形纳米孔）串行创建双折射体素。我们通过控制投射光斑的形状，演示了具有八个不同慢轴方位角的16×16双折射体素的并行写入。接下来，我们演示了五层并行数据写入，读出精度为100%，每张光盘的存储容量为1.5太字节。使用高重复率飞秒激光放大器（例如，100千赫兹），我们的方法理论上可以实现每秒7.5兆字节的写入速度，为高速、大容量光学数据存储铺平了道路。
