标题： 垂直腔面发射激光器中的偏振动力学 显示英文标题

标题： Polarization dynamics in vertical-cavity surface emitting lasers

摘要： 对在基模横模工作 regime 下的垂直腔面发射激光器中的偏振动力学和偏振切换的实验及其解释进行了综述。 重要的观察结果是切换到具有较低未饱和增益的模式，以及低频偏振模式不稳定后存在椭圆偏振的动力学过渡状态。 这些观察结果表明，需要明确考虑光场的相位特性以及阈值以上影响偏振选择的非线性效应。 如果将自旋翻转率取为几十个$10^9$~s$^{-1}$，则与一个考虑到光场及载流子的自旋自由度（“自旋翻转模型”）的模型有良好的定性一致。 这构成了一种强烈但间接的指示，表明在所研究的器件中，自旋相关过程在偏振选择中起着重要作用。 显示英文摘要

摘要： Experiments and their interpretation on polarization dynamics and polarization switching in vertical-cavity surface-emitting lasers operated in the fundamental transverse mode regime are reviewed. Important observations are switching events to a mode with the lower unsaturated gain and the existence of elliptically polarized dynamical transition states after the destabilization of the low-frequency polarization mode. The observations demonstrate the need to consider explicitly the phase properties of the optical field as well as nonlinear effects affecting polarization selection above threshold. Good qualitative agreement is found with a model which takes into account the spin degrees of freedom of the light field as well as of the carriers (`spin-flip model'), if the spin-flip rate is taken to be some tens of $10^9$~s$^{-1}$. This constitutes a strong -- though indirect -- indication that spin dependent processes are important in polarization selection in the devices investigated.