We predict a mechanism for achieving complete population inversion in a continuously driven InAs/GaAs semiconductor quantum dot featuring V-type transitions. This highly nonequilibrium steady state is enabled by the interplay between V-type interband transitions and a non-Markovian decoherence mechanism, introduced by acoustic phonons. The population trapping mechanism is generalized to a chain of coupled emitters. Exploiting the population inversion, we predict unidirectional excitation transport from one end of the chain to the other without external bias, independent of the unitary interdot coupling mechanism.
Bibliographical noteFunding Information:
O.K., A.K., and A.C. acknowledge support from the Deutsche Forschungsgemeinschaft (DFG) through SFB 910 project B1 (Project No. 163436311). E.V.D. and J.M. acknowledge support from the Danish National Research Foundation (Grant No. DNRF147). E.V.D. acknowledges funding from the Independent Research Fund Denmark.
© 2021 American Physical Society.