Direct writing-in and visualizing reading-out data storage with high capacity in low-cost plastics  

作　　者：Xin Wei Weiwei Zhao Jintao Yang Yong Zhang Junming Song Zhenhua Ni Junpeng Lu Hongwei Liu 

机构地区：[1]School of Physics and Key Laboratory of MEMS of the Ministry of Education,Southeast University,Nanjing 211189,China [2]Jiangsu Key Lab on Opto-Electronic Technology,School of Physics and Technology,Nanjing Normal University,Nanjing 210023,China

出　　处：《Journal of Semiconductors》2022年第6期23-28,共6页半导体学报（英文版）

基　　金：This work was supported by the National KRDPC(2019YFA0308000,2021YFA1200700),NSFC(91963130,61927808,62174026).The project is supported by“the Fundamental Research Funds for the Central Universities”.

摘　　要：The explosive growth of the global data volume demands new and advanced data storage methods.Here,we report that data storage with ultrahigh capacity(~1 TB per disc)can be realized in low-cost plastics,including polycarbonate(PC),precipitated calcium carbonate(PCC),polystyrene(PS),and polymethyl methacrylate(PMMA),via direct fs laser writing.The focused fs laser can modify the fluorescence of written regions on the surface and in the interior of PMMA,enabling threedimensional(3D)information storage.Through the 3D laser processing platform,a 50-layer data record with low bit error(0.96%)is archived.Visual reading of data is empowered by the fluorescence contrast.The broad variation of fluorescence intensity assigns 8 gray levels,corresponding to 3 bits on each spot.The gray levels of each layer present high stability after longterm aging cycles,confirming the robustness of data storage.Upon single pulse control via a high-frequency electro-optic modulator(EOM),a fast writing speed(~1 kB/s)is achieved,which is limited by the repetition frequency of the fs laser.

关 键 词：laser modification FLUORESCENCE micro-nano fabrication 

分 类 号：TP333[自动化与计算机技术—计算机系统结构] TQ320.7[自动化与计算机技术—计算机科学与技术]