Intense laser field effects on p – d exchange interaction in single manganese doped GaAs

Abstract

We have developed a comprehensive theory about optical control of p – d exchange interaction between spins of hole and Mn2+ in single-manganese doped GaAs material irradiated by a monochromatic, linearly polarized, intense pulsed laser field (PLF) under nonresonant conditions. The p – d exchange interaction leads to formation of magnetic polaron. While the PLF induces a dressed acceptor Coulomb potential, which transforms single center problem into the one with two virtual positively charged centers, resembling hydrogen molecule ion (H2+). The dichotomy of hole wave functions, determined by the laser-intensity, affects strongly the p – d exchange interaction as well as binding energy of magnetic polaron. Increasing the laser intensity reduces the magnetic polaron binding energy. At larger excitation intensity, the magnetic polaron can be completely dissolved.