Observation of dressed excitonic states in a single quantum dot

被引：83

作者：

Jundt, Gregor ^{[1
]}

Robledo, Lucio ^{[1
]}

Hoegele, Alexander ^{[1
]}

Faelt, Stefan ^{[1
]}

Imamoglu, Atac ^{[1
]}

机构：

[1] ETH, Inst Quantum Elect, CH-8093 Zurich, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.100.177401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the observation of dressed states of a quantum dot. The optically excited exciton and biexciton states of the quantum dot are coupled by a strong laser field and the resulting spectral signatures are measured using differential transmission of a probe field. We demonstrate that the anisotropic electron-hole exchange interaction induced splitting between the x- and y-polarized excitonic states can be completely erased by using the ac-Stark effect induced by the coupling field, without causing any appreciable broadening of the spectral lines. We also show that by varying the polarization and strength of a resonant coupling field, we can effectively change the polarization axis of the quantum dot.

引用

页数：4

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