The single quantum dot-laser: lasing and strong coupling in the high-excitation regime.
The single quantum dot-laser: lasing and strong coupling in the high-excitation regime.
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单量子点激光器：高激发态下的激光和强耦合。
DOI：
10.1364/oe.19.014370
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发表时间：
2011
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：
C. Gies;M. Florian;P. Gartner;F. Jahnke
基于半导体模型，研究了微腔中单个量子点的发射特性。作为系统泵浦速率的函数，我们研究了受激发射的开始，在强耦合区域实现受激发射的可能性，以及光子统计和发射光谱随激发的变化。详细分析了可能的激发荷电态和多激子态的作用，不同量子点跃迁的不同退相源，以及背景辐射对腔模的影响。在强耦合区，除了同一量子点的非共振跃迁引起的真空双重态外，发射光谱还可以在腔共振处包含一条线。如果强耦合持续在受激辐射区域，由于Jaynes-Cummings阶梯较高梯级的加宽贡献，腔谐振区附近的发射谱额外增加。
The emission properties of a single quantum dot in a microcavity are studied on the basis of a semiconductor model. As a function of the pump rate of the system we investigate the onset of stimulated emission, the possibility to realize stimulated emission in the strong-coupling regime, as well as the excitation-dependent changes of the photon statistics and the emission spectrum. The role of possible excited charged and multi-exciton states, the different sources of dephasing for various quantum-dot transitions, and the influence of background emission into the cavity mode are analyzed in detail. In the strong coupling regime, the emission spectrum can contain a line at the cavity resonance in addition to the vacuum doublet caused by off-resonant transitions of the same quantum dot. If strong coupling persists in the regime of stimulated emission, the emission spectrum near the cavity resonance additionally grows due to broadened contributions from higher rungs of the Jaynes-Cummings ladder.