Emission spectrum of a dressed exciton-biexciton complex in a semiconductor quantum dot
Emission spectrum of a dressed exciton-biexciton complex in a semiconductor quantum dot
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DOI：
10.1103/physrevlett.101.027401
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发表时间：
2008-07-11
影响因子：
8.6
通讯作者：
Solomon, Glenn S.
中科院分区：
文献类型：
--
作者：
Muller, Andreas;Fang, Wei;Solomon, Glenn S.
单个量子点的光致发光光谱被记录为光学修饰真空到激子或激子到双激子跃迁的二次谐振激光。使用扫描法布里-珀罗干涉仪进行的高分辨率偏振分辨测量揭示了非对称量子点中非简并的线性偏振精细结构态的分裂。这些分裂表现为三重态或双态，并且敏感地取决于激光强度和失谐。我们的方法实现了对发射中的多激子系统的完整谐振控制，该系统可以是脉冲波或连续波，并提供对发射光子的直接访问。
The photoluminescence spectrum of a single quantum dot was recorded as a secondary resonant laser optically dressed either the vacuum-to-exciton or the exciton-to-biexciton transitions. High-resolution polarization-resolved measurements using a scanning Fabry-Perot interferometer reveal splittings of the linearly polarized fine-structure states that are nondegenerate in an asymmetric quantum dot. These splittings manifest as either triplets or doublets and depend sensitively on laser intensity and detuning. Our approach realizes complete resonant control of a multiexcitonic system in emission, which can be either pulsed or continuous wave, and offers direct access to the emitted photons.