采用不同中间夹层的双记录层磁光光盘热光特性比较  

COMPARISON OF THE OPTICAL AND THERMAL CHARACTERISTICS OF A DOUBLE-RECORDING-LAYERED MAGNETO-OPTICAL DISK WITH DIFFERENT INTERLAYERS

作　　者：郑玉祥[1] 徐琮辉[1] 张荣君[1] 李晶[1] 王松有[1] 陈良尧[1] 

机构地区：[1]复旦大学光科学与工程系先进光子学材料与器件国家重点实验室,上海200433

出　　处：《红外与毫米波学报》2005年第6期445-449,共5页Journal of Infrared and Millimeter Waves

基　　金：国家自然科学基金(60478019)资助项目

摘　　要：磁光存储技术是一种颇受关注的下一代光存储技术.为提高单个磁光光盘的存储容量,途径之一是采用多值存储、多波长读出技术,实现所谓三维磁光存储.通常使用不同波长的蓝光来实现信号的读写操作.如果不同波长的激光在磁光存储多层膜中产生热场分布的差异较大,将有利于提高读出信号的信噪比.本文结合光学矩阵法及有限元方法分析了中间夹层分别为S iN、GaP时,磁光存储多层膜的热光特性.结果表明在蓝光波段,用GaP层替代传统的S iN中间夹层,将使磁光光盘具有更好的热光特性.Magneto-optical （MO） storage is an attractive technology for next generation storage. In order to increase the capacity of storage in a single disk, one of the approaches is applying the multi-valued recording and multi-wavelength readout technique, i. e. , so called 3-dimensional （3-D） MO storage. Lasers of different wavelengths are used to read or write data on different recording layers. The difference in the temperature profiles of this kind of MO disk caused by different lasers is expected to be large enough for improving the .signal to noise ratio （SNR）. In this study, optical matrix method and finite element method were applied to analyze the thermal and magneto-optical responses for a 3-D MO disk. The results show that the MO disk with GaP as interlayers has a potential in improving the thermal and optical performance at two blue wavelengths compared with the MO disk with SiN interlayers.

关 键 词：磁光存储 薄膜光学 磁光克尔效应. 

分 类 号：TP333.3[自动化与计算机技术—计算机系统结构] TP333.4[自动化与计算机技术—计算机科学与技术]