Four-wave mixing dynamics of excitons in InGaAs self-assembled quantum dots
Four-wave mixing dynamics of excitons in InGaAs self-assembled quantum dots
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DOI：
10.1088/0953-8984/19/29/295201
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发表时间：
2007-06
期刊：
影响因子：
--
通讯作者：
P. Borri;W. Langbein
中科院分区：
文献类型：
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作者：
P. Borri;W. Langbein
在本文中，我们总结了我们的实验工作，在自组装InAs/GaAs量子点的激子的退相，测量使用一个敏感的四波混频技术在外差检测。瞬态四波混频不仅可以测量激子的退相时间，还可以测量精细结构的分裂能和激子-双激子的结合能，这些都是实现量子点作为偏振纠缠光子对源和量子算法设计的重要物理参数。本文的范围是审查和讨论，在目前的理论背景下，并与其他实验在文献中，我们研究的一系列热退火量子点表现出系统的激子复合能和量子限制势的差异最显着的结果进行比较。我们将重点介绍这些测量的主要结果，并就仍需研究的开放性问题、可能的新实验和潜在的感兴趣领域提供一个视角。
In this paper we summarize our experimental work on the dephasing of excitons in self-assembled InAs/GaAs quantum dots, measured using a sensitive four-wave mixing technique in heterodyne detection. Transient four-wave mixing is a powerful technique to measure not only exciton dephasing times but also fine-structure splitting energies and exciton–biexciton binding energies which are important physical parameters for the implementation of quantum dots as source of polarization-entangled photon pairs and in the design of quantum algorithms. The scope of this paper is to review and discuss, in the context of present theories and in comparison with other experiments in the literature, the most significant results of our study on a series of thermally annealed quantum dots exhibiting systematic differences in the excitonic recombination energies and quantum confinement potentials. We will highlight the main outcomes of these measurements and give a perspective in terms of open questions that still need to be investigated, possible new experiments and potential areas of interest.