AI 中文总结
该研究揭示弹道极化激元凝聚体在特定参数下呈现亚临界分岔与双稳态，提出五次Stuart-Landau方程描述其动力学，实验验证相关行为，可用于设计极化激元存储装置。
AI 中文摘要
研究了连续波非相干高斯光泵浦下激子-极化激元凝聚体的动力学。结果表明，在参数空间的某个区域内，传统的超临界Stuart-Landau图像不成立。当极化激元对储库的排斥作用较强且泵浦光斑较小时，其动力学可由五次Stuart-Landau方程恰当描述。对应的亚临界叉形分岔会导致凝聚体形成，在有限泵浦功率范围内伴随平凡态与非平凡态之间的双稳态，形成一位存储器。排斥参数进一步增大或光斑尺寸减小会破坏微扰方法，产生具有复杂动力学的特殊自陷机制。实验提供了所提行为出现的证据，该发现可用于设计利用预测的记忆效应的极化激元装置。
英文摘要
Dynamics of exciton-polariton condensates under continuous-wave incoherent Gaussian optical pumping is considered. It is shown that the conventional supercritical Stuart-Landau picture is invalid in a certain domain of the parameter space. For strong polariton repulsion from the reservoir and relatively small pump spots, the dynamics is adequately described by the quintic Stuart-Landau equation. The corresponding subcritical pitchfork bifurcation leads to condensate formation, accompanied by bistability between the trivial and nontrivial states over a finite pump-power range and a one-bit memory. Further increase of the repulsion parameter or decrease of the spot size breaks down the perturbative approach and leads to a peculiar self-trapping regime with complex dynamics. Experimental evidence of the emergence of the proposed behavior is provided. Our findings can be used to design polaritonic setups that exploit the predicted memory effect.
Comments12 pages, 7 figures
