Direct observation of an ac Stark splitting in semiconductor microcavities excited above the continuum onset
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.
WOS:000085707000016
2000
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R5116
Swiss Fed Inst Technol, PHB Ecublens, Dept Phys, CH-1015 Lausanne, Switzerland. Univ Cagliari, Dipartimento Fis, I-09042 Monserrato, CA, Italy. Univ Cagliari, Ist Nazl Fis Mat, I-09042 Monserrato, CA, Italy. Quochi, F, Swiss Fed Inst Technol, PHB Ecublens, Dept Phys, CH-1015 Lausanne, Switzerland.
ISI Document Delivery No.: 290ZD
Cited Reference Count: 14
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