发表机构
Physikalisch-Chemisches Institut, Universität Heidelberg; Institute for Molecular Systems Engineering and Advanced Materials, Universität Heidelberg（海德堡大学物理化学研究所; 海德堡大学分子系统工程与先进材料研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究证明多晶铁电二维钙钛矿薄膜的超荧光可实现高达86%的线性偏振度，无需外部偏置，通过协同增益机制将微弱局部各向异性放大为宏观有序，为探测隐藏对称性和偏振量子光源提供新框架。
AI 中文摘要
超荧光（SF）是由自同步偶极子产生的强烈皮秒脉冲，有望用于室温量子源。然而，这种同步化能否将微弱的结构各向异性转化为稳健的宏观有序性，仍是一个悬而未决的问题。在此，我们证明多晶铁电二维钙钛矿薄膜表现出强线性偏振的超荧光，其偏振度（DOP）高达86%。值得注意的是，尽管微观畴随机取向，宏观偏振却在无外部偏置的情况下出现，这表明存在一种协同增益机制，能将微弱的局部各向异性放大数个数量级，转化为相干的线性偏振光脉冲。我们的结果确立了协同超荧光作为将微观各向异性转化为稳健宏观有序性的一般概念，此处以线性偏振为例加以说明，为探测隐藏的材料对称性提供了灵敏手段，并为偏振量子光源提供了框架。
英文摘要
Superfluorescence (SF), intense picosecond bursts from self-synchronizing dipoles, is promising for room-temperature quantum sources. Yet, whether this synchronization can convert weak structural anisotropies into robust macroscopic order remains an open question. Here, we demonstrate that polycrystalline ferroelectric 2D perovskite thin films exhibit strongly linearly polarized SF with a degree of polarization (DOP) up to 86%. Remarkably, macroscopic polarization emerges without external bias despite randomly oriented microscopic domains, suggesting a cooperative gain mechanism that amplifies weak local anisotropies by several orders of magnitude into coherent, linearly polarized light bursts. Our results establish cooperative superfluorescence as a general concept for translating microscopic anisotropy into robust macroscopic order, exemplified here for linear polarization, offering a sensitive probe of hidden material symmetries and a framework for polarized quantum light sources
