Anisotropy of in-plane hole g-factor in CdTe/ZnTe quantum dots

Abstract

Optical studies of a bright exciton provide only limited information about the hole anisotropy in a quantum dot. In this work we present a universal method to study heavy hole anisotropy using a dark exciton in a moderate in-plane magnetic field. By analysis of the linear polarization of the dark exciton photoluminescence we identify both isotropic and anisotropic contributions to the hole g-factor. We employ this method for a number of individual self-assembled CdTe/ZnTe quantum dots, demonstrating a variety of behaviors of in-plane hole g-factor: from almost fully anisotropic to almost isotropic. We conclude that, in general, both contributions play an important role and neither contribution can be neglected.

arXiv comment7 pages, 4 figures

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Cited by in corpus (3)

• Strong enhancement of heavy-hole Landé factor $q$ in InGaAs symmetric quantum dots revealed by coherent optical spectroscopy
• The in-plane anisotropy of the hole $g$ factor in CdTe/(Cd,Mg)Te quantum wells studied by spin-dependent photon echoes
• Measurements of anisotropic g-factors for electrons in InSb nanowire quantum dots