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arXiv 2208.13596cond-mat.quant-gasphysics.opticsquant-ph
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通过剪裁泵浦增强弹道激子-极化激元凝聚体之间的耦合

Enhanced coupling between ballistic exciton-polariton condensates through tailored pumping

Yuan Wang, Pavlos G. Lagoudakis, Helgi Sigurdsson

摘要:

提出了一种基于空间光调制器技术的半导体微腔中增强弹道激子-极化激元凝聚体之间空间耦合的方法。我们的方法,通过数值求解广义Gross-Pitaevskii模型验证,利用强非平衡性质的激子极化激元凝聚驱动本地化非共振光激发。将激发光束轮廓从高斯调整为多边形形状导致从激发的凝聚物流出的极化激元的折射和聚焦径向流,其可以被引导朝向最近的邻居。我们的方法可用于降低实现极化子凝聚所需的阈值功率,并增加扩展系统中的空间相干性,为创建超大规模光量子流体铺平道路。

英文摘要:

We propose a method to enhance the spatial coupling between ballistic exciton-polariton condensates in a semiconductor microcavity based on available spatial light modulator technologies. Our method, verified by numerically solving a generalized Gross-Pitaevskii model, exploits the strong nonequilibrium nature of exciton-polariton condensation driven by localized nonresonant optical excitation. Tailoring the excitation beam profile from a Gaussian into a polygonal shape results in refracted and focused radial streams of outflowing polaritons from the excited condensate which can be directed towards nearest neighbors. Our method can be used to lower the threshold power needed to achieve polariton condensation and increase spatial coherence in extended systems, paving the way towards creating extremely large-scale quantum fluids of light.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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