Anisotropy of in-plane hole g-factor in CdTe/ZnTe quantum dots
  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. 
A.Bogucki, T.Smole\'nski, M.Goryca, T.Kazimierczuk, J.Kobak, W.   Pacuski, P.Wojnar and P.Kossacki
cond-mat.mes-hall