Abstract
Linear and nonlinear properties in an ensemble of single-hole spin InGaAs/GaAs quantum dots aretheoretically studied. The application of a DC magnetic field in the semiconductor growth planeinduces a Zeeman splitting of the hole levels which can be modeled like a four-level atom in theX-type configuration. All-optical and magneto-optical switching of a weak probe field areshown to be feasible in this system either by changing the Rabi frequency of an auxiliarycontrol field or by changing the magnitude of the external magnetic field. We analyze thefeasibility to store and release a weak pulse from the medium resulting from Zeemancoherent oscillations, thus the system is expected to be useful to develop a variablesemiconductor optical buffer.
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