Power dependence on the nonlinear interaction enhancement in a coherently excited microcavity
2016
The enhanced nonlinear interaction in a silicon microcavity under coherent excitation is studied under different
conditions. By controlling the pulse frequency drift, we guarantee, at every instant, the coincidence with the frequency
resonance of the cavity that in the nonlinear regime suffers from a blue shift in time. This limiting shift effect is caused
by the free carriers generated by the strong silicon two-photon absorption. Owing to the linear time-frequency relation
of the pulse, the coupling efficiency to the drifted resonance can be maintained, further increasing the blue-shift. We
study the input power effect after using different pulse durations.
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