Impact of dipole orientation on strongly-coupled system composed of a single quantum dot and a photonic crystal L3 cavity

The strong coupling interaction realizes light manipulation at the single-photon level, while the dipole orientation plays a crucial role in the light-matter interaction in anisotropic environments. We investigate the impact of dipole orientation on the strongly-coupled system (SCS) composed of a single quantum dot and a photonic crystal L3 cavity. For both the ideal and the disordered SCS, as the quantum dot deflects from the ideal direction aligning with the cavity mode, the coupling strength and the vacuum Rabi splitting decrease even vanish, the anti-crossing behavior weakens even degrades to crossing behavior, and the vacuum Rabi oscillation period elongates even degrades to the irreversible decay. The dipole orientation has no impact on the coherence time of the SCS. These findings provide significant guidance for the manipulation of the SCS and the characterization of the dipole orientation of the quantum dot.