We present a magneto-optical study of individual self-assembled CdSe/ZnSe quantum dots doped with single Mn2+ ions. Properties of the studied dots are analyzed analogously to more explored system of Mn-doped CdTe/ZnTe dots. Characteristic sixfold splitting of the neutral exciton emission line as well as its evolution in the magnetic field are described using a spin Hamiltonian model. Dynamics of both exciton recombination and Mn2+ spin relaxation are extracted from a series of time-resolved experiments. Presence of a single dopant is shown not to affect the average excitonic lifetime measured for a number of nonmagnetic and Mn-doped dots. On the other hand, non-resonant pumping is demonstrated to depolarize the Mn2+ spin in a quantum dot placed in external magnetic field. This effect is utilized to determine the ion spin relaxation time in the dark.
@article{arxiv.1408.1981,
title = {CdSe/ZnSe quantum dot with a single Mn$^{2+}$ ion - a new system for a single spin manipulation},
author = {Tomasz Smoleński},
journal= {arXiv preprint arXiv:1408.1981},
year = {2015}
}
Comments
7 pages, 4 figures, submitted to Journal of Applied Physics as proceedings of the 32nd International Conference on the Physics of Semiconductors (ICPS 2014)