大容量光存储的维度扩展  

Dimension expansion of high-capacity optical data storage

作　　者：陈韦良 张静宇 Chen Weiliang;Zhang Jingyu(Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan,Hubei 430074,China;Key Laboratory of Information Storage System Ministry of Education of China,Huazhong University of Science and Technology,Wuhan,Hubei 430074,China)

机构地区：[1]华中科技大学武汉光电国家研究中心,湖北武汉430074 [2]华中科技大学信息存储系统教育部重点实验室,湖北武汉430074

出　　处：《光电工程》2019年第3期67-78,共12页Opto-Electronic Engineering

基　　金：国家自然科学重点基金项目(61432007)~~

摘　　要：随着数字化时代的发展,人类正进入一个大数据纪元。然而海量产生的数据已很难被全部记录,据估算,现有的数据载体已不足以存储人类产生数据的一半,如果该现状得不到改善,那么大量数据将会被强制舍弃。但改善这样的现状面临着难题,阿贝衍射极限的存在制约了光存储单元的大小,这使得传统光存储的容量被激光波长和物镜的数值孔径所限制。这个难题可以通过引入多维复用技术替代性地解决,本文针对多维存储中材料三维空间、偏振、波长等复用技术,综述了维度扩展在光存储中的研究成果以及未来的发展趋势。其中,着重介绍了基于纳米光栅的五维度光存储的发展历史、当前现状及亟需解决的问题。Human beings are entering a Big Data era,which has significantly boosted the current digital economy and society.But in reality,all current data storage technologies and mediums can only store less than half of what we generate,which means most of the data will be forcibly lost if without breakthrough in high-capacity storage technologies.However,Ernst Abbe set a fundamental barrier that limits the smallest feature size of a recording voxel to approximately half of the wavelength.Alternatively,this limitation could be overcome by implementing multiplex technology.In this review,techniques employed various multiplex dimensions such as 3D space,polarization and wavelength are briefly introduced.Especially,we highlight the development history,current state of the art and urgent challenges of five-dimensional optical data storage based on laser-induced nanogratings.

关 键 词：多维度光存储 光存储介质 光与物质相互作用 

分 类 号：TP333[自动化与计算机技术—计算机系统结构] TB872[自动化与计算机技术—计算机科学与技术]