通过电子关联控制透明金属中的自发发射
Controlling spontaneous emission via electronic correlations in transparent metals
摘要：
研究了嵌入相关透明金属中的二能级量子发射体团簇的自发发射。特征发射能量对应于中性的非线性分子杂质（F色心）的基态和激发态之间的分裂，而相关性是由于金属中存在窄带。这是具有ABO 3过氧化物结构的过渡金属氧化物的情况，例如SrVO 3和CaVO 3，其中氧空位负责发射可见光，而相关的金属性质产生于主要具有d轨道特征的带的部分填充。对于这些系统，我们提出了一个跨学科的，可调的机制来控制由电子相关的光发射。我们发现，不仅存在一个临界值的相关强度以上的金属变得透明的可见光，但也强相关性可以导致一个显着增强的光-物质耦合。通过揭示电子相关性在自发发射中的作用，我们的研究结果为相关透明金属中可控固态单光子源的设计奠定了基础。
英文摘要：
We study the spontaneous emission of agglomerates of two-level quantum emitters embedded in a correlated transparent metal. The characteristic emission energy corresponds to the splitting between ground and excited states of a neutral, nonmagnetic molecular impurity (F color center), while correlations are due to the existence of narrow bands in the metal. This is the case of transition metal oxides with an ABO3 Perovskite structure, such as SrVO3 and CaVO3, where oxygen vacancies are responsible for the emission of visible light, while the correlated metallic nature arises from the partial filling of a band with mostly d-orbital character. For these systems we put forward an interdisciplinary, tunable mechanism to control light emission governed by electronic correlations. We show that not only there exists a critical value for the correlation strength above which the metal becomes transparent in the visible, but also that strong correlations can lead to a remarkable enhancement of the light-matter coupling. By unveiling the role of electronic correlations in spontaneous emission, our findings set the basis for the design of controllable, solid-state, single-photon sources in correlated transparent metals.
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