Measurement of the g-factor tensor in a quantum dot and disentanglement of exciton spins

B.J. Witek, R.W. Heeres, U. Perinetti, E.P.A.M. Bakkers, L.P. Kouwenhoven, V. Zwiller

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Abstract

We perform polarization-resolved magneto-optical measurements on single InAsP quantum dots embedded in an InP nanowire. In order to determine all elements of the electron and hole g-factor tensors, we measure in magnetic fields with different orientations. The results of these measurements are in good agreement with a model based on exchange terms and Zeeman interaction. In our experiment, polarization analysis delivers a powerful tool that not only significantly increases the precision of the measurements, but also enables us to probe the exciton spin-state evolution in magnetic fields. We propose a disentangling scheme of heavy-hole exciton spins enabling a measurement of the electron spin T2-time.
Original languageEnglish
Article number195305
Pages (from-to)195305-1/7
Number of pages7
JournalPhysical Review B
Volume84
Issue number19
DOIs
Publication statusPublished - 2011

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