Cancellation of fine-structure splitting in quantum dots by a magnetic field

被引：1
|
作者：
Stevenson, R. M.
Young, R. J.
See, P.
Gevaux, D. G.
Cooper, K.
Atkinson, P.
Farrer, I.
Ritchie, D. A.
Shields, A. J.
机构：
[1] Toshiba Res Europe Ltd, Cambridge CB4 0WE, England
[2] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
来源：
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2006年 / 32卷 / 1-2期
关键词：
quantum dots; magnetic fields; fine structure;
D O I：
10.1016/j.physe.2005.12.025
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We demonstrate control of the fine-structure splitting of the exciton emission lines in single InAs quantum dots by the application of an in-plane magnetic field. The composition of the barrier material and the size and symmetry of the quantum dot are found to determine decrease or increase in the linear polarization splitting of the dominant exciton emission lines with increasing magnetic field. This enables the selection of dots for which the splitting can to be tuned to zero, within the resolution of our experiments. General differences in the g-factors and exchange splittings are found for different types of dot. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：135 / 138
页数：4
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