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

BJ Witek, RW Heeres, U Perinetti, EPAM Bakkers, LP Kouwenhoven, V Zwiller

Research output: Contribution to journalArticleScientificpeer-review

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
Pages (from-to)1-7
Number of pages7
JournalPhysical Review B (Condensed Matter and Materials Physics)
Volume84
Publication statusPublished - 2011

Keywords

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