On the lifetime of plasmonic transducers in heat assisted magnetic recording
On the lifetime of plasmonic transducers in heat assisted magnetic recording
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DOI：
10.1063/1.4745050
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发表时间：
2012-08
影响因子：
3.2
通讯作者：
B. Budaev;D. Bogy
中科院分区：
文献类型：
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作者：
B. Budaev;D. Bogy
为了使热辅助磁记录系统成功，它必须将热量传递到磁盘上的一个小点，而不被施加的功率损坏。本文表明，这样的条件可能不容易达到的系统，使用激光能量和等离子体近场换能器。它还表明，近场换能器的分析和设计不能依赖于连续介质的电动力学的传统麦克斯韦方程的数值积分，因为这样的方程隐含地包含许多假设，是无效的纳米系统。在这里，我们检查这些方程的推导中固有的假设，并指出如果它们被应用到热辅助磁记录系统的金属纳米级元素，违反了哪些假设。本文的主体部分集中在支持我们结论的著名实验结果上，而推导部分则放在附录中。
For a heat assisted magnetic recording system to be successful, it must deliver heat to a small spot on a magnetic disk without being damaged by the applied power. This paper shows that such conditions may not be easily attained in systems that use laser energy and plasmonic near field transducers. It is also shown that the analysis and design of the near field transducers cannot rely on numerical integration of the conventional Maxwell equations of electrodynamics of continuous media, because such equations implicitly incorporate numerous assumptions that are not valid in nanoscale systems. Here, we examine assumptions inherent in the derivation of these equations and point out which assumptions are violated if they are applied to the metallic nanoscale elements of heat assisted magnetic recording systems. The main body of the paper focuses on the well-known experimental results that support our conclusions while the derivations are relegated to the appendices.