Abstract
A composite system is investigated by a full quantum approach,two orthogonal degenerate whispering-gallery cavity modes coupling to a quantum dot(QD).The energy levels of the QD are modeled by a three-level system consisting of the ground state,right-and left-polarized excitons.The counterclockwise mode and the clockwise mode are coupled with the transitions with respect to right-and left-polarized excitons,respectively.We analyze the photon transport of the composite system,describing the coupling between the QD and the two cavity modes by two parameters gR and gL.The transmission and reflection amplitudes are solved exactly via a real-space approach.The numerical results of the system show mixed nature both of the cavity and the QD,and one can overcome the excitons fine structure splitting(FSS) via getting a appropriate backscattering rate ? by fine designing the cavity.
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