超分辨近场结构光盘的传统以及差分读出方法研究  

Traditional and Differential Readout Technology for Super-Resolution Near-Field Structure Disc

作　　者：胡文华[1] 常胜利[1] 杨建坤[1] 李修建[1] 谭吉春[1] 

机构地区：[1]国防科学技术大学理学院技术物理研究所,湖南长沙410073

出　　处：《光学学报》2011年第6期205-209,共5页Acta Optica Sinica

基　　金：国家自然科学基金(60907003;61070040);国防科学技术大学校预研基金(JC09-02-12)资助课题

摘　　要：利用标量衍射理论和角谱方法,针对超分辨近场结构光盘存储系统建立了简单物理模型,并提出了超分辨近场结构光盘的读出信号仿真计算方法。通过对比实际测试信号与模拟信号,证明了该读出信号计算方法的可行性。此外,针对超分辨掩膜层对不同功率入射激光响应不同的特性,分别分析了单轨道和三轨道记录符在高、低功率两束激光读出下的差分信号。数值模拟发现,与传统读出信号相比,差分读出方法能够减小来自邻道的串扰,而且利用差分读出方法获得的信号质量更高。Based on the established simple model of an optical system, the traditional readout signal of super- resolution near-field structure （Super-RENS） disc is simulated according to scalar diffraction theory and angular spectrum method. By comparing simulation results with experimental signals, the validity of the calculation method is proved. Moreover, the differential signal, which is the difference of signals read out by high and low power incident laser, is simulated for single track and three tracks recording pattern. It is shown that, by using the differential readout method, the cross talk from adjacent pits is decreased and high quality readout signal can be obtained.

关 键 词：光数据存储 差分读出方法 标量衍射理论 读出信号 

分 类 号：O436[机械工程—光学工程]