Emission properties and photon statistics of a single quantum dot laser.
Emission properties and photon statistics of a single quantum dot laser.
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单量子点激光器的发射特性和光子统计。
DOI：
10.1364/oe.18.009909
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发表时间：
2010
期刊：
影响因子：
3.8
通讯作者：
F. Jahnke
中科院分区：
文献类型：
--
作者：
S. Ritter;P. Gartner;C. Gies;F. Jahnke
建立了微腔中单个量子点发射体的理论描述，分析了提高稳态泵浦速率时，从光子反聚束的强耦合区域到相干发射的弱耦合区域的转变。结果表明，激发载流子的库仑相互作用和激发引起的退相可以强烈地改变发射性质。我们的理论研究是基于耦合载流子-光子系统的Liouville-von Neumann方程的直接解。我们包括量子点中的多个载流子激发，它们的库仑相互作用，以及激发诱导的退相和屏蔽。讨论了与原子系统的异同，并解释了最近实验的结果。
A theoretical description for a single quantum-dot emitter in a microcavity is developed.We analyze for increasing steady-state pump rate the transition from the strong-coupling regime with photon antibunching to the weak-coupling regime with coherent emission. It is demonstrated how Coulomb interaction of excited carriers and excitation-induced dephasing can strongly modify the emission properties. Our theoretical investigations are based on a direct solution of the Liouville-von Neumann equation for the coupled carrier-photon system. We include multiple carrier excitations in the quantum dot, their Coulomb interaction, as well as excitation-induced dephasing and screening. Similarities and differences to atomic systems are discussed and results in the regime of recent experiments are interpreted.