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Quantum Optoelectronics

Coherent control of the temporal evolution of spontaneous emission from excitons in GaAs quantum wells

Michael Woerner, Jagdeep Shah

Published Jan 1, 1999• 0 citations
Publisher

Abstract

In a recent paper [1] we have experimentally demonstrated that the coherence properties of resonant secondary emission (RSE) from excitons in quantum wells change distinctly as a function of the elapsed tune after impulsive excitation.
DOI
10.1364/qo.1999.qtuc3

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Using a novel technique, we simultaneously study the femtosecond dynamics of the amplitude and the coherence of resonant secondary emission from GaAs quantum wells. Two phase-locked pulses resonantly excite excitons in the semiconductor and the subsequently emitted radiation is detected by femtosecond up-conversion. In experiments at various delays and phases between the excitation pulses we identify three different contributions to the secondary emission with different coherence properties in time.