This work shows how electric field can be used to tune excitonic fine-structure splitting in coupled InAs/InP nanowire quantum dots. It identifies a regime where bright-exciton splitting can be reduced without simultaneously suppressing optical activity.
Keywords: nanowire quantum dots, InAs/InP, quantum dot molecules
Main result: strong interdot coupling enables electric-field tuning of bright-exciton splitting down to zero while preserving useful optical strength. This makes nanowire quantum-dot molecules attractive for entangled-photon applications.