Multi-layer magnetic recording driven by a tunable laser  

作　　者：Xiaoqiang Zhang Guanghao Rui Yong Xu Fan Zhang Yinchang Du Mingtao Lian Xiaoyang Lin Anting Wang Hai Ming Weisheng Zhao 张晓强;芮光浩;许涌;张帆;杜寅昌;连明涛;林晓阳;王安廷;明海;赵巍胜(Hefei Innovation Research Institute,School of Microelectronics,Beihang University,Hefei 230013,China;Fert Beijing Institute,BDBC,Beihang University,Beijing 100191,China;Advanced Photonics Center,Southeast University,Nanjing 210096,China;Department of Optics and Optical Engineering,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]Hefei Innovation Research Institute,School of Microelectronics,Beihang University,Hefei 230013,China [2]Fert Beijing Institute,BDBC,Beihang University,Beijing 100191,China [3]Advanced Photonics Center,Southeast University,Nanjing 210096,China [4]Department of Optics and Optical Engineering,University of Science and Technology of China,Hefei 230026,China

出　　处：《Chinese Optics Letters》2020年第10期63-68,共6页中国光学快报（英文版）

基　　金：supported by the China Postdoctoral Science Foundation (No. 2019M650437);the National Natural Science Foundation of China (No. 51602013);the Beihang Hefei Innovation Research Institute Project (Nos. BHKX-19-01 and BHKX-19-02)

摘　　要：All-optical magnetization switching with features of low-power consumption and high writing speed is a promising road map to satisfy the demand for volume data storage. To promote denser and faster magnetic recording technologies, herein, all-optical helicity-dependent switching(AO-HDS) in multi-layer magnetic recording is proposed based on the chromatic aberration of an optical lens(Thorlabs’ s N-BK7 plano-convex uncoated lens).The power of the incident beams and the thickness of the multi-layer magnetic recording film are designed carefully. Besides, the uniformity of this multi-layer magnetic recording is optimized. At last, a prototype system of information multiplexing based on this multi-layer magnetic recording technology is constructed as well. Flexible and controllable magnetization reversals in different layers are also demonstrated by tuning the wavelength and helicity of working beams. We believe that such a prototype system can pave the way for increasing the storage density in an effective and low-cost mode.

关 键 词：all-optical magnetization switching multi-level magnetic recording focal shift chromatic aberration 

分 类 号：TM564[电气工程—电器] TN248[电子电信—物理电子学]