Impact of the Energetic Landscape on Polariton Condensates' Propagation along a Coupler
Impact of the Energetic Landscape on Polariton Condensates' Propagation along a Coupler
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DOI：
10.1002/adom.202000650
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发表时间：
2020-07-08
影响因子：
9
通讯作者：
Vina, Luis
中科院分区：
文献类型：
--
作者：
Rozas, Elena;Beierlein, Johannes;Vina, Luis
极化子凝聚体的传播在很大程度上取决于粒子运动所处的特定能量景观，其中为其运动奠定的路径的几何形状起着至关重要的作用。电路轨迹的弯曲会影响凝聚体的速度，而倾斜的几何形状会由于传播本征值上的短轴和长轴波矢的混合而引入极化激元动量的额外离散化。在这项工作中，凝聚体的传播性质沿着的极化激元耦合器的武器的研究相结合的时间分辨的显微层析成像测量和理论模型的基础上的平均场近似，其中凝聚的极化激元描述的方程耦合到一个方程的非相干激子的密度的极化激元场的缓慢变化的振幅。
Polariton condensates' propagation is strongly dependent on the particular energy landscape the particles are moving upon, in which the geometry of the pathway laid for their movement plays a crucial role. Bends in the circuit's trajectories affect the condensates' speed and oblique geometries introduce an additional discretization of the polaritons' momenta due to the mixing of short and long axis wavevectors on the propagating eigenvalues. In this work, the nature of the propagation of condensates along the arms of a polariton coupler is studied by a combination of time-resolved micro-tomography measurements and a theoretical model based on a mean field approximation where condensed polaritons are described by an equation for the slow varying amplitude of the polariton field coupled to an equation for the density of incoherent excitons.