Superradiance Effects in the Linear and Nonlinear Optical Response of Quantum Dot Molecules
A. Sitek and P. Machnikowski
Institute of Physics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
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Received: 7 06 2008;
We calculate the linear optical response from a single quantum dot molecule and the nonlinear, four-wave-mixing response from an inhomogeneously broadened ensemble of such molecules. We show that both optical signals are affected by the coupling-dependent superradiance effect and by optical interference between the two polarizations. As a result, the linear and nonlinear responses are not identical.
DOI: 10.12693/APhysPolA.114.1355
PACS numbers: 78.67.Hc, 78.47.nj, 42.50.Ct