We study the coherent optical response of a very high-finesse microcavity with a single quantum well by means of degenerate subpicosecond pump-probe spectroscopy. The dynamics of the ac Stark effect versus Pump intensity is investigated upon tuning the empty-cavity;mode-below and above the exciton transition energy, at the exciton continuum onset. The evolution from a simple dynamical excitonic shift to a dynamical splitting is clearly observed in both eases. The qualitative, agreement with numerical calculations based on the semiconductor Maxwell-Bloch equations is good.
Direct observation of an ac Stark splitting in semiconductor microcavities excited above the continuum onset
QUOCHI, FRANCESCO;SABA, MICHELE;BONGIOVANNI, GIOVANNI LUIGI CARLO;MURA, ANTONIO ANDREA
2000-01-01
Abstract
We study the coherent optical response of a very high-finesse microcavity with a single quantum well by means of degenerate subpicosecond pump-probe spectroscopy. The dynamics of the ac Stark effect versus Pump intensity is investigated upon tuning the empty-cavity;mode-below and above the exciton transition energy, at the exciton continuum onset. The evolution from a simple dynamical excitonic shift to a dynamical splitting is clearly observed in both eases. The qualitative, agreement with numerical calculations based on the semiconductor Maxwell-Bloch equations is good.
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