Coherence and dephasing in self-assembled quantum dots

被引：0

作者：

Hvam, JM ^{[1
]}

Leosson, K ^{[1
]}

Birkedal, D ^{[1
]}

机构：

[1] Tech Univ Denmark, Res Ctr COM, DK-2800 Lyngby, Denmark

来源：

2003 THIRD IEEE CONFERENCE ON NANOTECHNOLOGY, VOLS ONE AND TWO, PROCEEDINGS | 2003年

关键词：

quantum dots; exciton coherence; dephasing; homogeneous and inhomogeneous line widths;

D O I：

暂无

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

We measured dephasing times in InGaAlAs self-assembled quantum dots at low temperature using degenerate four-wave mixing. At OK, the coherence time of the quantum dots is lifetime limited, whereas at finite temperatures pure dephasing by exciton-phonon interactions governs the quantum dot coherence. The inferred homogeneous line widths are significantly smaller than the line widths usually observed in the photoluminescence from single quantum dots indicating an additional inhomogeneous broadening mechanism in the latter.

引用

页码：122 / 125

页数：4

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