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

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 field 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 $T_2$ time.

References in corpus (5)

• Coherent Population Trapping of an Electron Spin in a Single Negatively Charged Quantum Dot
• Tunable effective g-factor in InAs nanowire quantum dots
• Coherent transfer of light polarization to electron spins in a semiconductor
• Size dependent exciton g-factor in self-assembled InAs/InP quantum dots
• Tuning the exciton g-factor in single InAs/InP quantum dots

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