Creation and Manipulation of Stable Dark Solitons and Vortices in Microcavity Polariton Condensates.
Creation and Manipulation of Stable Dark Solitons and Vortices in Microcavity Polariton Condensates.
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DOI：
10.1103/physrevlett.118.157401
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发表时间：
2016-12
影响因子：
8.6
通讯作者：
Xuekai Ma;O. Egorov;S. Schumacher
中科院分区：
文献类型：
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作者：
Xuekai Ma;O. Egorov;S. Schumacher
孤子和涡旋在不同的物理系统中得到了广泛的关注，因为它们在信息存储、处理和通信方面具有潜在的用途。在半导体微腔中的激子-极化子凝聚体中，可以光学地产生孤子和涡旋。然而，暗孤子是不稳定的，涡旋不能在空间上控制。在本工作中，我们证明了在简单的空间周期泵浦的极化子凝聚体的非共振非相干激发下，存在稳定的暗孤子和涡旋。在一维中，我们证明了一个附加的相干光脉冲可以用来以受控的方式产生或摧毁暗孤子。在二维中，我们证明了相干光束可以用来将涡旋移动到晶格上的特定位置，或者通过简单地将周期泵浦结构从二维(晶格)切换到一维(条纹)来启动。我们的理论结果为光学按需产生和控制极化凝聚体中的暗孤子和涡旋提供了令人兴奋的可能性。
Solitons and vortices obtain widespread attention in different physical systems as they offer potential use in information storage, processing, and communication. In exciton-polariton condensates in semiconductor microcavities, solitons and vortices can be created optically. However, dark solitons are unstable and vortices cannot be spatially controlled. In the present work we demonstrate the existence of stable dark solitons and vortices under nonresonant incoherent excitation of a polariton condensate with a simple spatially periodic pump. In one dimension, we show that an additional coherent light pulse can be used to create or destroy a dark soliton in a controlled manner. In two dimensions we demonstrate that a coherent light beam can be used to move a vortex to a specific position on the lattice or be set into motion by simply switching the periodic pump structure from two-dimensional (lattice) to one-dimensional (stripes). Our theoretical results open up exciting possibilities for optical on-demand generation and control of dark solitons and vortices in polariton condensates.