We have grown high quality p-type δ-doped InAs quantum dots and have demonstrated coherent spin pumping and repumping of a hole spin in a positively charged quantum dot by means of a single-laser driving scheme under a high magnetic field in the Voigt configuration. Modeling of our system shows excellent qualitative agreement with the experimental findings and further explores the performance of the single-laser scheme for spin pumping and repumping.
Lagoudakis, K. G., Fischer, K. A., Sarmiento, T., Mueller, K., & Vučković, J. (2014). Hole-spin pumping and repumping in a p-type δ-doped InAs quantum dot. Physical Review B, 90(12), . https://doi.org/10.1103/PhysRevB.90.121402