Optical transitions, exciton radiative decay, and valley coherence in lead chalcogenide quantum dots
PHYSICAL REVIEW B(2022)
摘要
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 interband coupling.
更多查看译文
关键词
lead chalcogenide quantum dots,optical transitions,valley coherence,decay
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要