Henri Thyrrestrup, Alex Hartsuiker, Jean-Michel Gérard, Willem L. Vos
We have theoretically studied the deterministic switching in the time domain of the spontaneous emission of two-level emitters in an optical microcavity. We consider a system in the weak coupling regime, for which the refractive index of the cavity material is modified on a time scale shorter than the emitted lifetime, through the injection of free charge carriers. The equation of motion is introduced for the excited population of two-level emitters coupled to a time-dependent local density of optical states. We then derived the emitted intensity as a function of time for both continuous wave and pulsed excitation of the embedded emitters. We demonstrate that a short temporal increase of the radiative decay rate drastically increases the emission intensity during the switch time for both continuous wave excitation and pulsed excitation. For pulsed excitation, the resulting spontaneous emission shows a distribution of photon arrival times with a deterministic burst of photons during the switch event, that strongly deviates from the standard exponential law. Finally, we derive a figure of merit that quantifies the total switching action.
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http://arxiv.org/abs/1301.7612
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