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首页> 外文期刊>IEEE Transactions on Magnetics >Application of simulation on the design of phase-change optical recording disks
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Application of simulation on the design of phase-change optical recording disks

机译：仿真在相变光记录盘设计中的应用

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Optical absorption and thermal conduction are the two key factors affecting temperature distribution and, subsequently, the write, erase characteristics of a phase-change optical recording disk. Therefore, by using carefully measured film physical properties of each layer, this work simulates a transient temperature profile while simultaneously considering optical absorption and thermal conduction. Through the simulated transient temperature profile, cooling-rate and reflectivity, dependence of phase-changed spot size on the laser power and laser pulse duration was observed. The proper combination of the disk structure and the associated write, erase conditions are obtained as well. A disk structure can subsequently be designed on the basis of this information. In addition, a novel dielectric layer, i.e. hydrogenated amorphous carbon (/spl alpha/-C:II), is simulated and compared with the disk applying conventionally used ZnS-SiO/sub 2/ dielectric layers. The disk structures used herein are PC/ZnS-SiO/sub 2//GeSbTe/ZnS-SiO/sub 2//Al and PC//spl alpha/-C:H/GeSbTe//spl alpha/-C:H/Al. According to those results, /spl alpha/-C:H film is highly promising as a dielectric layer of the phase change optical recording disk for both wavelengths of 780 and 660 nm.
机译：光学吸收和热传导是影响温度分布以及相变光记录盘的写，擦除特性的两个关键因素。因此，通过仔细测量每一层的薄膜物理特性，这项工作可以模拟瞬态温度曲线，同时考虑光吸收和热传导。通过模拟的瞬态温度曲线，冷却速率和反射率，观察到相变光斑尺寸对激光功率和激光脉冲持续时间的依赖性。磁盘结构和相关的写入，擦除条件的正确组合也可以得到。随后可以基于该信息来设计磁盘结构。另外，模拟了新颖的介电层，即氢化无定形碳（/ spl alpha / -C：II），并与应用常规使用的ZnS-SiO / sub 2 /介电层的磁盘进行了比较。本文使用的盘结构是PC / ZnS-SiO / sub 2 // GeSbTe / ZnS-SiO / sub 2 // Al和PC // spl alpha / -C：H / GeSbTe // spl alpha / -C：H /铝根据这些结果，/ spl alpha / -C：H膜作为相变光学记录盘的介电层在波长为780和660 nm时都非常有前途。

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