Volume 81, Number 2, January 2008
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||06 December 2007|
Large optical gain from four-wave mixing instabilities in semiconductor quantum wells
College of Optical Sciences, University of Arizona - Tucson, AZ 85721, USA
Accepted: 9 November 2007
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.
PACS: 71.35.-y – Excitons and related phenomena / 78.47.+p – Time-resolved optical spectroscopies and other ultrafast optical measurements in condensed matter / 42.65.Sf – Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics
© EPLA, 2008
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