This work extends electric-field control of exciton fine structure to alloyed nanowire quantum-dot molecules, where alloy randomness itself becomes part of the physics. It shows that nominally identical structures can exhibit qualitatively different field evolution of excitonic spectra.
Keywords: nanowire quantum dots, quantum dot molecules, fine-structure splitting
Main result: alloy randomness can both generate and reshape fine-structure splitting in nanowire quantum-dot molecules under electric field. Yet selected realizations still allow sub-µeV splitting without losing optical activity.