相对论性ExB漂移激发的向极化奇点的加速
Acceleration toward polarization singularity inspired by relativistic ExB drift
摘要：
受洛伦兹力驱动的带电粒子的相对论运动轨迹与经典运动轨迹不同，存在速度依赖的相对论加速度项。在这里，我们表明，光学偏振态附近的偏振奇异性的演变可以描述类似的带电粒子的相对论动力学。一个相变宇称时间对称的潜力，然后解释在电场和磁场的“伪”场之间的竞争施加到极化状态。基于这种洛伦兹赝力表象，我们揭示了零洛伦兹赝力是最近报道的在例外点处强极化收敛到奇异态的起源。我们还展示了确定性的设计的非手性和方向的本征态在例外的点，允许一个异常的线性偏振器，其操作正交的向前和向后波。我们的研究结果连接宇称时间对称性和相对论电动力学表明，以前的PT对称电位的偏振奇异性与手征本征态的ExB的“偏振”漂移的光学电位的子集。
英文摘要：
The relativistic trajectory of a charged particle driven by the Lorentz force is different from the classical one, by velocity-dependent relativistic acceleration term. Here we show that the evolution of optical polarization states near the polarization singularity can be described in analogy to the relativistic dynamics of charged particles. A phase transition in parity-time symmetric potentials is then interpreted in terms of the competition between electric and magnetic 'pseudo'-fields applied to polarization states. Based on this Lorentz pseudo-force representation, we reveal that zero Lorentz pseudo-force is the origin of recently reported strong polarization convergence to the singular state at the exceptional point. We also demonstrate the deterministic design of achiral and directional eigenstates at the exceptional point, allowing an anomalous linear polarizer which operates orthogonal to forward and backward waves. Our results linking parity-time symmetry and relativistic electrodynamics show that previous PT-symmetric potentials for the polarization singularity with a chiral eigenstate are the subset of optical potentials for the ExB "polarization" drift.
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