Injection Locking of High-β Quantum Dot Microlasers
In this experimental work, we control the nonlinear properties of microlasers by means of external optical injection. We achieve this in the particularly interesting system of a quantum dot based microlaser operating in the regime where cavity quantum electrodynamics (cQED) effects are significant. The investigated quantum dot micropillar laser possesses two competing modes with orthogonal polarization. Under optical injection in one mode, the microlaser partially locks to the master laser, enabling the suppression or enhancement of the non-injected mode via control of the detuning. In addition, cross-correlation measurements prove that temporal switching between both modes can drastically be increased by optical injection.