Optical Aharonov-Bohm effect in stacked type-II quantum dots

Abstract

Excitons in vertically stacked type-II quantum dots (QDs) experience a topological magnetic phase and demonstrate Aharonov-Bohm oscillations in emission intensity. The photoluminescence of vertically stacked $\mathrm{Zn}\mathrm{Te}∕\mathrm{Zn}\mathrm{Se}$ QDs is measured in magnetic fields up to $31\phantom{\rule{0.3em}{0ex}}\mathrm{T}$. Aharonov-Bohm oscillations are found in the magnetic-field dependence of the emission intensity. The positions of the peaks of the emission intensity are in good agreement with numerical simulations of excitons in stacked QDs.