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

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

2006-01-30

arxiv.org/abs/quant-ph/0601199v1

Phys. Rev. B 73, 033306 (2006)

Physics

Quantum Physics

12 pages, 3 figures

Scientific paper

10.1103/PhysRevB.73.033306

By the application of an in-plane magnetic field, we demonstrate control of the fine structure polarisation 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 behaviour allows us to determine g-factors and exchange splittings for different types of dots.

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