Simulation on Near-Field Light on Recording Medium Generated by Semiconductor Ring Resonator with Metal Nano-Antenna for Heat-Assisted Magnetic Recording
Simulation on Near-Field Light on Recording Medium Generated by Semiconductor Ring Resonator with Metal Nano-Antenna for Heat-Assisted Magnetic Recording
复制标题
热辅助磁记录金属纳米天线半导体环形谐振器在记录介质上产生近场光的模拟
DOI：
10.1007/s10043-020-00612-w
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发表时间：
2020
期刊：
影响因子：
1.2
通讯作者：
Ryuichi Katayama and Satoshi Sugiura
中科院分区：
文献类型：
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作者：
Jinghan Chen;Ryuichi Katayama;and Satoshi Sugiura;Ryuichi Katayama and Satoshi Sugiura
热辅助磁记录（HAMR）是一种很有前途的磁记录技术，可实现10 Tbit/inch 2以上的记录密度。在HAMR中，在记录介质上形成小光斑的近场换能器（NFT）是必需的。然而，NFT产生的热量会融化NFT本身。为了解决这个问题，作者提出了一种新的设备，其中金属纳米天线连接到半导体环形谐振器。为了优化器件的结构，本文基于包含记录介质的三维模型，通过数值模拟的方法对器件产生的近场光进行了分析。结果表明，如何在多个本征模中选择性地激发出所需的本征模，对器件的有效性至关重要。在记录介质的表面上获得直径约为25 nm的光斑，其对应于1 Tb/inch 2的记录密度。还发现必须考虑记录介质来优化器件的设计参数。
Heat-assisted magnetic recording (HAMR) is a promising technology for achieving more than 10 Tbit/inch2recording density. A near-field transducer (NFT), which forms a small light spot on a recording medium, is necessary in HAMR. However, the heat generated by the NFT would melt the NFT itself. To solve this problem, the authors have proposed a novel device, in which a metal nano-antenna is attached to a semiconductor ring resonator. In this paper, the near-field light generated by this device was analyzed through a numerical simulation based on a 3-dimensional model including the recording medium to optimize the structure of the device. It was found that how to excite a desired eigenmode selectively among some eigenmodes is important to make the device effective. A light spot with a diameter of about 25 nm, which corresponds to the recording density of 1 Tb/inch2, was obtained on the surface of the recording medium. It was also found that the design parameters of the device must be optimized considering the recording medium.