arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2104.12982physics.optics
收藏

利用自旋轨道耦合实现对称性保护的光子手征自旋织构

Symmetry-protected photonic chiral spin textures by spin-orbit coupling

Peng Shi, Luping Du, Mingjie Li, Xiaocong Yuan

摘要:

手征自旋织构在凝聚态系统中得到了广泛的研究,并在自旋电子学和存储方面显示出潜在的应用前景。随着对手征自旋织构的凝聚态研究的深入,在各种反转对称性破缺的光学系统中也观察到了这些织构的光子对应物。不幸的是,这些不平衡只是现象学上的。本文提出了一个基于变分原理的理论框架,证明了光学界面中光子手征自旋织构的形成是由系统的对称性和相对论性决定的。光学系统的旋转对称性的分析表明,从自旋矢量的局部变化的总角动量守恒被保存。具体地说,虽然积分自旋动量不携带净能量,但决定局部亚光速能量输运和最小化总角动量平方变化的局部自旋动量分布导致自旋矢量的手征扭曲。这些结果加深了对光学系统对称性、守恒定律和能量输运的理解,建立了光子和凝聚态手征自旋织构在形成机制和几何结构上的相似性,并在光学操纵和手征光子学中具有重要的应用价值.

英文摘要:

Chiral spin textures are researched widely in condensed matter systems and show potential for spintronics and storage applications. Along with extensive condensed-matter studies of chiral spin textures, photonic counterparts of these textures have been observed in various optical systems with broken inversion symmetry. Unfortunately, the resemblances are only phenomenological. This work proposes a theoretical framework based on the variational theorem to show that the formation of photonic chiral spin textures in an optical interface is derived from the system's symmetry and relativity. Analysis of the optical system's rotational symmetry indicates that conservation of the total angular momentum is preserved from the local variations of spin vectors. Specifically, although the integral spin momentum does not carry net energy, the local spin momentum distribution, which determines the local subluminal energy transport and minimization variation of the square of total angular momentum, results in the chiral twisting of the spin vectors. The findings here deepen the understanding of the symmetries, conservative laws and energy transportation in optical system, construct the comparability in the formation mechanisms and geometries of photonic and condensed-matter chiral spin textures, and suggest applications to optical manipulation and chiral photonics.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑