A density‐matrix approach combined with time‐dependent density‐functional theory is used to calculate the intersubband photoabsorption in a strongly driven, DC‐biased GaAs/AlGaAs single quantum well. For certain frequencies and intensities of the driving field, optical bistability is observed. Compared to a full time propagation of the density matrix, the commonly used two‐level rotating wave approximation becomes less and less accurate for increasing asymmetry.
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Research Article| June 30 2005
Nonlinear Intersubband Photoabsorption in Asymmetric Single Quantum Wells
H. O. Wijewardane;
AIP Conf. Proc. 772, 1141–1142 (2005)
H. O. Wijewardane, C. A. Ullrich; Nonlinear Intersubband Photoabsorption in Asymmetric Single Quantum Wells. AIP Conf. Proc. 30 June 2005; 772 (1): 1141–1142. https://doi.org/10.1063/1.1994513
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