新视角下的旧实验：液晶微腔中的杨氏双缝实验和施特恩-格拉赫实验
Old experiments in new light: Young's double-slit and Stern-Gerlach experiments in liquid crystal microcavities
摘要：
自旋轨道相互作用是自旋电子学应用的核心，它将粒子的自旋与动量自由度耦合起来。在半导体物理学中特别感兴趣的是Rashba和Dresselhaus自旋轨道耦合（SOC）。当Rashba场和Dresselhaus场的强度相等时，它们导致SU（2）自旋旋转对称性，并导致只在半导体量子阱中研究的载流子的持续自旋螺旋（PSH）的出现。最近，一个合成的Rashba-Dresselhaus哈密顿量被证明可以描述被光学各向异性液晶填充的微腔中的腔光子。在这项工作中，我们提出了一个纯光学实现的两种类型的自旋图案对应的PSH和施特恩-格拉赫实验在这样的腔。我们展示了如何对称的哈密顿结果在空间振荡的自旋方向的光子在腔的平面内行进。
英文摘要：
Spin-orbit interactions which couple spin of a particle with its momentum degrees of freedom lie at the center of spintronic applications. Of special interest in semiconductor physics are Rashba and Dresselhaus spin-orbit coupling (SOC). When equal in strength, the Rashba and Dresselhaus fields result in SU(2) spin rotation symmetry and emergence of the persistent spin helix (PSH) only investigated for charge carriers in semiconductor quantum wells. Recently, a synthetic Rashba-Dresselhaus Hamiltonian was shown to describe cavity photons confined in a microcavity filled with optically anisotropic liquid crystal. In this work, we present a purely optical realisation of two types of spin patterns corresponding to PSH and the Stern-Gerlach experiment in such a cavity. We show how the symmetry of the Hamiltonian results in spatial oscillations of the spin orientation of photons travelling in the plane of the cavity.
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