论文标题
不均匀地拓宽介质合奏的光发射的一阶连贯性
First-order coherence of light emission from inhomogeneously broadened mesoscopic ensembles
论文作者
论文摘要
众所周知，不均匀的拓宽会阻碍发射器的个体特征，从而通过更广泛的概率分布来代替单粒子性质。在这里，我们介绍了低于热力学极限（10-10^4发射器）的不均匀分布发射器的介观异形的发射光谱的分析。基于简单的分析模型和广泛的数值分析，我们表明，尽管发射不均匀，但可以从集合自相关函数直接估算发射器的数量和单个线宽。作为应用，我们分析了嵌入金壳中的胶体纳米晶体聚集体的光致发光。我们的一般方法可以应用于广泛的介绍多体系统，并可以为其一阶连贯性能提供新的见解。
Inhomogeneous broadening is well known to hinder individual characteristics of emitters, supplanting the single-particle properties by their broader probability distribution. Here, we present an analysis of the emission spectra of mesoscopic ensembles of inhomogeneously distributed emitters below the thermodynamic limit (10 - 10^4 emitters). Based on a simple analytical model and an extensive numerical analysis, we show that the number and individual linewidths of the emitters can be directly estimated from the ensemble autocorrelation function in spite of an inhomogeneously broadened emission. As an application, we analyze the photoluminescence of colloidal nanocrystal aggregates embedded in a gold shell. Our general method can be applied to a wide range of mesoscopic many-body systems and could provide new insights into their first-order coherence properties.
