Large optical gain from four-wave mixing instabilities in semiconductor quantum wells

Details Large optical gain from four-wave mixing instabilities in semiconductor quantum wells Large optical gain from four-wave mixing instabilities in semiconductor quantum wells

2007-08-03

arxiv.org/abs/0708.0442v2

Europhys. Lett. 81, 27003 (2008)

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

10.1209/0295-5075/81/27003

Based on a microscopic many-particle theory, we predict large optical gain in the probe and background-free four-wave mixing directions caused by excitonic instabilities in semiconductor quantum wells. For a single quantum well with radiative-decay limited dephasing in a typical pump-probe setup we discuss the microscopic driving mechanisms and polarization and frequency dependence of these instabilities.

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