Heat-assisted magnetic recording (HAMR) is a promising technology for achieving more than 10 Tbit/inch² recording 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.

热辅助磁记录（HAMR）是一种有前途的技术，可实现超过10 Tbit / inch ²记录密度。在HAMR中，需要在记录介质上形成小光点的近场换能器（NFT）。但是，NFT产生的热量会熔化NFT本身。为了解决这个问题，作者提出了一种新颖的装置，其中金属纳米天线被附接到半导体环形谐振器。在本文中，通过基于三维模型（包括记录介质）的数值模拟分析了该设备产生的近场光，以优化设备的结构。已经发现，如何在某些本征模式中选择性地激发期望的本征模式对于使装置有效很重要。直径约25 nm的光斑，对应于1 Tb / inch ²的记录密度是在记录介质的表面上获得的。还发现必须考虑记录介质来优化设备的设计参数。