手性腔驱动的手性声子
Chiral phonons driven by chiral cavities
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中文总结 AI 辅助
本文提出利用受驱动电磁腔产生稳态手性声子，推导腔与手性声子的相互作用描述，可产生有效声子诱导磁场，为研究手性声子开辟新途径。
中文摘要 AI 辅助
携带角动量的晶格振动会产生声子霍尔效应、爱因斯坦-德哈斯效应等基本现象，为凝聚态系统中角动量的操控提供新机遇。产生这类圆偏振声子需借助外磁场或偏振光脉冲；后者无需利用材料的任何磁响应，但存在局限，尤其是脉冲时长的限制，导致光脉冲产生的声子引发的任何效应都是瞬态的。本文提出利用受驱动电磁腔作为产生稳态手性声子布居的途径，推导了腔-手性声子相互作用的一般描述，尤其聚焦于手性腔的模式。研究表明，在优化条件下，利用具有实际功率的外驱动可产生显著的有效声子诱导磁场；该方法专门针对太赫兹频率的Γ点声子量身定制，为借助电磁腔研究手性声子开辟了新途径。
英文摘要
Lattice vibrations carrying angular momentum give rise to fundamental phenomena such as the phonon Hall effect and the Einstein-de Haas effect, offering new opportunities for manipulating angular momentum in condensed-matter systems. Generating such circularly polarized phonons requires either the use of an external magnetic field, or of polarized light pulses. The latter approach does not require the use of any magnetic response of the material, but it has limitations, in particular regarding the duration of the pulse. Consequently, any effect stemming from phonons generated by light pulses is transient. In this paper, we propose the use of a driven electromagnetic cavity as a route to generate a steady-state population of chiral phonons. We derive a general description of cavity-chiral phonon interaction, with a particular focus on modes of chiral cavities. We show that, under optimized conditions, a significant effective phonon-induced magnetic field can be generated by means of an external drive with realistic power. Our approach is specially tailored for Gamma point phonons with THz frequencies, and opens a new route for investigating chiral phonons with electromagnetic cavities.
发表机构
- Universidad Nacional Autónoma de México（墨西哥国立自治大学）
- Université de Strasbourg（斯特拉斯堡大学）
- Chalmers University of Technology（查尔姆斯理工大学）
- Karlsruhe Institute of Technology（卡尔斯鲁厄理工学院）
机构由 AI 辅助整理，请以论文原文为准。
