Anisotropic spin splitting of the electron ground state in InAs quantum dots

TL;DR

This paper measures the anisotropic electron g factor in InAs quantum dots using photoinduced circular dichroism, revealing precise values for different magnetic field orientations and confirming theoretical predictions.

Contribution

It provides the first precise experimental determination of the anisotropic electron g factor in InAs quantum dots, validating recent theoretical models.

Findings

Measured g_perp = 0.397 ± 0.003

Measured g_par = 0.18 ± 0.02

Confirmed theoretical predictions of g factor anisotropy

Abstract

Photoinduced circular dichroism experiments in an oblique magnetic field allow measurements of Larmor precession frequencies, and so give a precise determination of the electron Lande g factor and its anisotropy in self-assembled InAs/GaAs quantum dots emitting at 1.32 eV. In good agreement with recent theoretical results, we measure g perp= 0.397 +_ 0.003 and g par = 0.18 +- 0.02.