纳米级强超短磁脉冲的光产生
Optical generation of intense ultrashort magnetic pulses at the nanoscale
摘要:
在更短的时间和长度尺度上产生、控制和感测强磁场对于基础固态物理和诸如磁数据记录的技术应用都是重要的。在这里,我们提出了一个计划,用于产生强超短磁脉冲定位在纳米尺度。我们发现,飞秒激光脉冲照射的纳米环响应与皮秒持续时间的瞬态热电流,这反过来又引起特斯拉规模的磁场在环形腔。我们的方法提供了一个实用的方法产生强烈的纳米磁场材料表征,太赫兹辐射的产生,和数据存储应用的巨大潜力。
英文摘要:
Generating, controlling, and sensing strong magnetic fields at ever shorter time and length scales is important for both fundamental solid-state physics and technological applications such as magnetic data recording. Here, we propose a scheme for producing strong ultrashort magnetic pulses localized at the nanoscale. We show that a bimetallic nanoring illuminated by femtosecond laser pulses responds with transient thermoelectric currents of picosecond duration, which in turn induce Tesla-scale magnetic fields in the ring cavity. Our method provides a practical way of generating intense nanoscale magnetic fields with great potential for materials characterization, terahertz radiation generation, and data storage applications.
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