Polarization sensitive spectroscopy of charged quantum dots

Polarization sensitive spectroscopy of charged quantum dots
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带电量子点的偏振敏感光谱

DOI:
10.1002/pssc.200777634
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发表时间:
2008
期刊:
physica status solidi c
影响因子:
--
通讯作者:
Poem E
Poem E
中科院分区:
--
文献类型:
--
作者:
Poem E

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本文对单量子点在不同电荷状态下的偏振光致发光谱进行了实验和理论研究。我们将我们的偏振敏感光谱测量与一种新的多载波理论模型进行了比较。该模型考虑了所有参与电子-空穴对之间的各向同性和各向异性交换相互作用。我们证明了从均匀带电态发出的线是线性极化的。它们测量的偏振方向不一定与传统的晶体学方向一致。它取决于参与复合过程的单个载流子的壳层。(© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA,魏因海姆)
We present an experimental and theoretical study of the polarized PL spectrum of single semiconductor quantum dots in various charge states. We compare our polarization sensitive spectral measurements with a novel many‐carrier theoretical model. The model considers both the isotropic and anisotropic exchange interactions between all participating electron‐hole pairs. We demonstrate that lines emanating from evenly charged states are linearly polarized. Their measured polarization direction does not necessarily coincide with the traditional crystallographic direction. It depends on the shells of the single carriers which participate in the recombination process. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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