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We study the processes in a quantum dot and its surrounds under resonantexcitation with the addition of weak non-resonant light. We observe a decreasein inhomogeneous emission linewidth, as well as previously observed enhancementof resonant fluorescence (RF). Scanning excitation and detection frequencies,we distinguish between homogeneous and inhomogeneous broadening. Monte Carlosimulations model the enhanced RF only if we include charge-carrier loss fromthe quantum dot induced by the resonant laser. The cause of the linewidthnarrowing is predominantly independent of the enhanced RF.

Quantum dot resonant-fluorescence linewidth narrowing and enhanced intensity