论文标题
光学转变，激子辐射衰减和谷元素量子量点中的山谷相干性
Optical transitions, exciton radiative decay, and valley coherence in lead chalcogenide quantum dots
论文作者
论文摘要
我们提出了在倒数空间中山谷连贯性和超高的概念，并表明它导致$ n $ -N $ -VALLEY SEMICONCONDUCTOR的量子点（QDS）的明亮激光辐射寿命（QDS）的$ n $倍降低。接下来，我们解释了为什么，尽管如此，从光致发光衰减中测量的PBX（X = S，SE，TE）中的激子辐射寿命在微秒范围内。我们还讨论了由狭窄的狭窄材料制成的纳米结构中的光 - 物质相互作用的特殊性。
We propose the concept of valley coherence and superradiance in the reciprocal space and show that it leads to an $N$-fold decrease of the bright exciton radiative lifetime in quantum dots (QDs) of an $N$-valley semiconductor. Next we explain why, despite this, the exciton radiative lifetimes in PbX (X = S, Se, Te) QDs, measured from the photoluminescence decay, are in the microsecond range. We also address peculiarities of the light-matter interaction in nanostructures made of narrow-gap materials with strong inter-band coupling.
