A light delivery system based on localized surface plasmon (LSP) is the key component of heat-assisted magnetic recording (HAMR). We demonstrated a novel resonator–antenna system as the light delivery system for HAMR. We numerically analyzed the interaction mechanism between the resonator waveguide and the antenna. The localized enhanced resonated field of the resonator can improve the electric-field enhancement of the antenna. Based on the interaction mechanism, we proposed the ring resonator to achieve higher electric-field enhancement of light spots as the resonated field can be several times higher than input light under the resonance condition. The input laser energy can be recycled by limiting the energy in the ring waveguide without using higher power laser sources. Numerical results show that the nanofocusing performance in the ring resonator system would be much better than normal light systems. The maximum electric-field enhancement of light spots can be 124, and the absorption efficiency can be about 10% in the ring-lollipop system. The proposed resonator–antenna system can effectively increase the nanofocusing performance of the light delivery system for HAMR.

中文翻译：

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使用环形谐振器的 HAMR 等离子天线的高场增强

基于局部表面等离子体 (LSP) 的光传输系统是热辅助磁记录 (HAMR) 的关键组件。我们展示了一种新型谐振器-天线系统作为 HAMR 的光传输系统。我们数值分析了谐振器波导和天线之间的相互作用机制。谐振器的局部增强谐振场可以改善天线的电场增强。基于相互作用机制，我们提出了环形谐振器来实现光点的更高电场增强，因为在谐振条件下谐振场可以比输入光高几倍。输入激光能量可以通过限制环形波导中的能量而不使用更高功率的激光源来回收。数值结果表明，环形谐振腔系统的纳米聚焦性能比普通光系统要好得多。光点的最大电场增强可以达到124，在环形棒棒糖系统中吸收效率可以达到10%左右。所提出的谐振器-天线系统可以有效地提高 HAMR 光传输系统的纳米聚焦性能。