Realization of all-optical vortex switching in exciton-polariton condensates
Realization of all-optical vortex switching in exciton-polariton condensates
复制标题
激子-极化子凝聚态全光涡旋切换的实现
DOI：
10.1038/s41467-020-14702-5
复制
发表时间：
2020-02-14
影响因子：
16.6
通讯作者：
Schumacher, Stefan
中科院分区：
文献类型：
--
作者：
Ma, Xuekai;Berger, Bernd;Schumacher, Stefan
漩涡是表示流体圆周运动的拓扑对象。由于它们具有更多的自由度和涡度，它们在许多物理系统和不同的材料中得到了广泛的研究，以获得基本的兴趣，并在数据存储和信息处理中得到应用。在平面半导体微腔中的非平衡激子-极化子凝聚体中也观察到了涡旋。在那里，它们会自发出现，或者可以使用环形光激发轮廓在太空中创建和固定。然而，使用涡旋状态进行信息处理不仅需要创建涡旋，而且还需要在涡旋创建之后对其进行有效的控制。在这里，我们演示了一种简单的方法来控制和切换局域极化子涡在相反的状态之间。在我们的方案中，涡度的光学控制和通过发射光的轨道角动量来检测涡度都是一种稳健和实用的方式。
Vortices are topological objects representing the circular motion of a fluid. With their additional degree of freedom, the vorticity, they have been widely investigated in many physical systems and different materials for fundamental interest and for applications in data storage and information processing. Vortices have also been observed in non-equilibrium exciton-polariton condensates in planar semiconductor microcavities. There they appear spontaneously or can be created and pinned in space using ring-shaped optical excitation profiles. However, using the vortex state for information processing not only requires creation of a vortex but also efficient control over the vortex after its creation. Here we demonstrate a simple approach to control and switch a localized polariton vortex between opposite states. In our scheme, both the optical control of vorticity and its detection through the orbital angular momentum of the emitted light are implemented in a robust and practical manner.