Magnetic-field-induced reduction of the exciton polarization splitting in InAs quantum dots

被引：163

作者：

Stevenson, RM

Young, RJ

See, P

Gevaux, DG

Cooper, K

Atkinson, P

Farrer, I

Ritchie, DA

Shields, AJ

机构：

[1] Toshiba Res Europe Ltd, Cambridge CB4 0WE, England

[2] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

来源：

PHYSICAL REVIEW B | 2006年 / 73卷 / 03期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevB.73.033306

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

By the application of an in-plane magnetic field, we demonstrate control of the fine structure polarization splitting of the exciton emission lines in individual InAs quantum dots. The selection of quantum dots with certain barrier composition and confinement energies is found to determine the magnetic field dependent increase or decrease of the separation of the bright exciton emission lines, and has enabled the splitting to be tuned to zero within the resolution of our experiments. Observed behavior allows us to determine g factors and exchange splittings for different types of dots.

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页数：4

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